What size strap does a Yema watch take?

It depends on the family, and Yema is the brand where the odd 19mm width is common. Of the 110 watches in the brand's own store, 35 print Lugs: 19mm on the product page, 42 print 20mm, 17 are 24mm integrated (Wristmaster and Urban Traveller, brand-specific straps only), 3 print 18mm (Granvelle Renaissance), 2 print 22mm (Superman Tourbillon), and the 8 women's references print 16mm (Femme) or 14mm (Radiance). The only sure rule is the printed Lugs line on your exact reference's page.

Do Yema Superman watches take a 19mm or 20mm strap?

Both, and the case size decides. The core Superman CMM.10 models (Steel, Bronze, Gilt) print Lugs: 19mm whether you pick the 39mm or 41mm case. The Superman Dato is 20mm, the Superman Slim CMM.20 is a 39mm watch at 20mm, the Worldtime GMT is 20mm, and the Superman Heritage and Heritage GMT pages print both: Lugs: 19mm on the smaller case and 20mm on the 41mm-plus case. The titanium Tourbillon is the only 22mm Superman. Many strap retailers list the Superman flat at 20mm, which is wrong for every 39mm reference.

Which Yema watches use a 24mm integrated strap?

The Wristmaster Slim, Wristmaster Traveller and Urban Traveller families, 17 watches total, all print Lugs: 24mm, and the strap is integrated: it fixes into the case rather than attaching with standard spring bars, so ordinary 24mm straps do not fit. You need Yema's own FKM Viton integrated straps or the brand's Scales bracelets for these references.

Does Yema publish its own band size chart?

No. Yema has no consolidated sizing page; the width lives only in the Lugs line of each product page's spec block, which is where every row in this chart comes from. Two references, the Navygraf PAN Charles de Gaulle in both case sizes, print no width at all, and that gap is flagged in the chart.

Yema band size chart by model

Yema prints a spec block on every watch page, and inside it a standalone line: Lugs: 19mm ^[10]. We pulled the brand's whole store, 110 watches ^[32], and read the Lugs line on every reference: 35 print 19mm, 42 print 20mm, and 17 are 24mm integrated straps that no standard band fits. Yema is the rare brand where the odd 19mm width is a household size, on 39mm Supermans, Navygrafs, Flygraf Pilots and Yachtingrafs, while strap retailers round the same watches up to 20mm ^[35].

Quick answers: 39mm Superman CMM.10, Navygraf, Flygraf Pilot and Yachtingraf take 19mm. Superman Dato, Slim and Worldtime, Rallygraf, Skin Diver and the 40mm Flygrafs take 20mm. Wristmaster and Urban Traveller take a 24mm integrated strap, brand-specific only. Womens references take 16mm (Femme) or 14mm (Radiance). The Superman Heritage page prints both 19mm and 20mm because the case choice changes the strap ^[2].

The chart: 28 families, 110 watches, widths from Yema's own pages

Family	Case (mm)	Thick (mm)	Lug to lug (mm)	Lug width	Covers	Watch out
Superman CMM.10 (Steel, Bronze, Gilt)	39 / 41 / 39	11 to 11.3	-	19mm ^[1]	12 watches: Superman Bronze, Superman Bronze Black Limited Edition, Superman Bronze Blue Limited Edition, Superman Bronze Limited Edition, Superman Gilt, Superman Steel Blue, Superman Steel ^[1]	all 19mm regardless of the 39 or 41mm case option; the single most-common Yema width
Superman Heritage	39	-	-	19mm (39mm case) / 20mm (41mm case) ^[2]	1 watches: Superman Heritage ^[2]	one page, two widths: the 39mm case takes 19mm and the 41mm case takes 20mm, printed as Lugs: 19mm \| 20mm
Superman Heritage GMT	38.5 / 41.5	11.7	-	19mm (38.5) / 20mm (41.5) ^[3]	1 watches: Superman Heritage GMT Bronze ^[3]	same variant split as the Heritage three-hander: Lugs 19mm on 38.5, 20mm on 41.5
Superman Dato CMM.10	39.5 / 41 / 39.5	11.85	-	20mm ^[4]	5 watches: Superman Dato, Superman Dato Paris Édition Limitée ^[4]	20mm where the core Superman is 19mm; the Dato Paris limited edition is the single-SKU 39.5mm
Superman Slim CMM.20	39	9.95	-	20mm ^[5]	2 watches: Superman Slim ^[5]	a 39mm Superman that takes 20mm: case size alone will not pick your strap
Superman Worldtime GMT	40	11.5	-	20mm ^[6]	2 watches: Superman Worldtime GMT Coke, Superman Worldtime GMT Steel ^[6]	40mm case, 20mm lugs
Superman MoonTide CMM.11	38.5	11.3	47	19mm ^[7]	1 watches: Superman Titanium MoonTide Limited Edition ^[7]	titanium tide watch, 38.5mm, 19mm, 47mm lug to lug
Superman Tourbillon CMM.31	43	11.7	-	22mm ^[8]	2 watches: Superman Titanium Tourbillon Limited Edition, Superman Tourbillon Limited Edition ^[8]	the only 22mm Superman, on a 43mm titanium case
Navygraf (CMM.10, Pearl, Phantom, FSM)	38.5 / 39 / 40	9.75 to 13.9	46	19mm (Chrono 20mm) ^[9]	9 watches: Navygraf Barracuda Limited Edition, Navygraf, Navygraf Chrono, Navygraf FSM Bronze, Navygraf Meteorite Limited Edition, Navygraf Pearl, Navygraf Pearl Limited Edition, Navygraf Phantom Limited Edition ^[9]	19mm across the line at 46mm lug to lug, except the 40mm Navygraf Chrono at 20mm
Navygraf Heritage	39	10.85	46	19mm ^[10]	2 watches: Navygraf Heritage ^[10]	the reference that proves the 19mm print: 39mm case, 10.85mm thick, Lugs: 19mm
Navygraf Marine Nationale (mens)	39	9.85 to 11	46	19mm ^[11]	4 watches: Navygraf Marine Nationale 400th Anniversary Edition, Navygraf Marine Nationale, Navygraf Marine Nationale Quartz ^[11]	19mm on every mens MN reference; the Femme versions drop to 16mm
Navygraf PAN Charles de Gaulle	38.5 / 39	-	-	not printed ^[12]	2 watches: Navygraf PAN Charles de Gaulle ^[12]	neither CDG page prints a Lugs line at all: the 38.5mm super-compressor and the 39mm mineral-crystal version list case and straps only
Flygraf	38.5 / 39 / 40	8.8 to 13.9	46	19mm (38.5) / 20mm (40) ^[13]	8 watches: Flygraf Bi-Compax French Air Force, Flygraf CPA10, Flygraf Navigator, Flygraf Pilot, Flygraf Pilot French Air Force, Flygraf Pilot M1 ^[13]	split by case: the 38.5mm Pilots take 19mm, the 40mm Bi-Compax, Navigator and CPA10 take 20mm
Rallygraf	39 / 40 / 41	10.2 to 12.5	47	20mm ^[14]	10 watches: Rallygraf Alpine Cup Series, Rallygraf Alpine Cup Series MKII Limited Edition, Rallygraf Alpine Cup Series Limited Edition, Rallygraf Meca-Quartz II Classic Racing School, Rallygraf Meca-Quartz II Panda, Rallygraf Meca-Quartz II Reverse Panda, Rallygraf Meca-Quartz Panda, Rallygraf Meca-Quartz Reverse Panda ^[14]	20mm across every Rallygraf, 39 to 41mm cases
Yachtingraf	38.5	10.3 to 13	-	19mm ^[15]	3 watches: Yachtingraf Croisière Meca-Quartz, Yachtingraff seconde / seconde / ^[15]	19mm on 38.5mm cases, including the seconde / seconde / collaboration
Granvelle CMM.29	39	8.6	-	20mm ^[16]	3 watches: Granvelle ^[16]	20mm on the 39mm dress CMM.29
Granvelle Renaissance	37.5	8.5	46.3	18mm ^[17]	3 watches: Granvelle Renaissance ^[17]	18mm on the 37.5mm Renaissance, 46.3mm lug to lug, the only 18mm Yema
Skin Diver CMM.20	39.5	11.5	47	20mm ^[18]	3 watches: Skin Diver ^[18]	20mm on 39.5mm, 47mm lug to lug
Skin Diver Slim	39	9.9 to 10	47	20mm ^[19]	4 watches: Skin Diver Slim Bronze, Skin Diver Slim Bronze Limited Edition, Skin Diver Slim Limited Edition, Skin Diver Slim Full Lume Limited Edition ^[19]	20mm on 39mm; the prose prints the curved 20mm lugs explicitly
YEMA Diver	39.5	10.95 to 11.7	-	20mm ^[20]	3 watches: Diver ^[20]	20mm on 39.5mm
Pearldiver	38	14	46	20mm ^[21]	1 watches: Pearldiver ^[21]	20mm on a 38mm case, 46mm lug to lug
Meangraf Super	39	13	-	20mm ^[22]	2 watches: Meangraf Super Japan Limited Edition ^[22]	20mm on 39mm; Japan-market limited editions follow the same width
Yema x Alain Silberstein	40	11	44.5	20mm ^[23]	2 watches: x Alain Silberstein Limited Edition, Yema x Silberstein Marine 2 Limited Edition ^[23]	20mm on 40mm, both the original and the Marine 2; 44.5mm lug to lug on the Marine 2
Wristmaster Slim	39	9	-	24mm ^[24]	8 watches: Wristmaster Slim, Wristmaster Slim Limited Edition, Wristmaster Slim Small Seconds, Wristmaster Slim Small Seconds Camo, Wristmaster Slim Small Seconds Camo Special Edition ^[24]	24mm INTEGRATED strap: no standard spring-bar strap fits, sizes are brand-specific
Wristmaster Traveller	39	11.4	-	24mm ^[25]	3 watches: Wristmaster Traveller ^[25]	24mm integrated like the Slim
Urban Traveller	39	10.8 to 11.4	-	24mm ^[26]	6 watches: Urban Traveller ^[26]	24mm integrated; the card-flagged non-standard-fit family
Radiance (womens)	24 / 30	6.3	-	14mm ^[27]	5 watches: Radiance ^[27]	14mm on a 24 x 30mm rectangular case; satin strap with pin buckle
Femme references (16mm)	34	8.95 to 10.5	-	16mm ^[28]	3 watches: Flygraf French Air & Space Force UTC Femme, Navygraf Marine Nationale 400th Anniversary Edition Femme, Navygraf Marine Nationale Femme ^[28]	16mm on 34mm cases: Navygraf MN Femme x2 and the Flygraf UTC Femme

The 19mm trap: where retailers say 20

Every 39mm core Superman prints Lugs: 19mm ^[1], every mens Navygraf on a 39mm case prints 19mm ^[9], the Flygraf Pilots on 38.5mm print 19mm ^[13] and the Yachtingrafs print 19mm ^[15]. Yet the accessory market treats 20mm as the default: Barton, one of the largest strap retailers, titles its bands for the Yema Superman at a flat 20mm lug width ^[35]. A 20mm strap forced onto 19mm lugs bows the spring bar and wrecks the fit. If your Yema is a 39mm diver, assume 19mm until its own page says otherwise.

Case size does not decide the strap

Two rules people reach for, both wrong here. First, bigger case means bigger strap: the 39mm Superman Slim CMM.20 takes 20mm ^[5] while the 39mm Superman CMM.10 next to it takes 19mm ^[1], and the 38mm Pearldiver takes 20mm ^[21] while the 38.5mm Navygraf Phantom takes 19mm. Second, one model line one width: the Granvelle name spans 18mm on the 37.5mm Renaissance ^[17] and 20mm on the 39mm CMM.29, and the Flygraf name spans 19mm and 20mm by case ^[30]. Only the printed Lugs line is reliable.

The 24mm integrated families: standard straps do not fit

The Wristmaster Slim, Wristmaster Traveller and Urban Traveller, 17 watches, all print Lugs: 24mm ^[24], but the number understates the problem: the strap is integrated, molded to fix into the case body rather than held by spring bars. An ordinary 24mm two-piece strap cannot be mounted. These references take Yema's own FKM Viton integrated straps or its Scales bracelets, sold by width and case generation. The MoonTide, which looks integrated in photos, is not: its page prints a standard Lugs: 19mm ^[31].

One page, two widths: the Heritage split

The Superman Heritage and Heritage GMT pages each sell two case sizes, and Yema prints both widths on one line: Diameter: 39mm | 41mm, Lugs: 19mm | 20mm on the Heritage ^[2] and Lugs : 19mm | 20mm against 38.5mm | 41.5mm on the Heritage GMT ^[3]. The order is the mapping: smaller case, 19mm, larger case, 20mm. Check which case you own before ordering.

The gap in the catalog: Charles de Gaulle prints no width

Two references in the store print no Lugs line at all, both Navygraf PAN Charles de Gaulle: the 38.5mm super-compressor page lists its case, crystal and three straps with no width ^[12], and the 39mm brushed version with the K1 mineral crystal does the same ^[29]. We flag rather than guess: measure the lug gap, or ask Yema, before buying a strap for either.

Womens references: 16mm and 14mm

The Femme versions of the Navygraf Marine Nationale and the Flygraf UTC print Lugs: 16mm on 34mm cases ^[28], and the Radiance prints 14mm on a 24 x 30mm rectangular case with a satin strap ^[27]. These are proper spec lines, not marketing copy, so the same first-party rule holds.

How we verified this

We enumerated the brand's own store feed (189 products: 110 watches, 76 accessories, 3 unclassified) and fetched every watch product page, parsing the CASE AND CRYSTAL spec block on each ^[32]. All 110 pages returned; 108 print a Lugs line (35x 19mm, 42x 20mm, 17x 24mm, 3x 18mm, 3x 16mm, 5x 14mm, 2x 22mm), one page prints two widths for two case options, and the two Charles de Gaulle pages print none. Lug-to-lug figures appear only where Yema prints them in the page prose (46mm on the Navygrafs, 47mm on the Supermans and Skin Divers, 46.3mm on the Granvelle Renaissance, 44.5mm on the Silberstein Marine 2). Nothing is inferred from case size and no retailer figure appears in any row; the retailer example above is quoted as the contradiction, not the source. Incumbents checked at build time: watchbands.ai lists 189 brands and carries exactly one measured Yema reference ^[33], and lug2lug.org's Yema page lists models and prices with no width data ^[34]. If your reference is not in the current store, measure the gap: the measuring guide covers the caliper method.

Related guides

The lug width chart by brand places Yema's 19mm-heavy spread against brands that stick to even widths, and the master band size chart indexes every brand on this site. For other French-marine-heritage catalogs see the Serica chart, and for another odd-width-heavy brand see the Spinnaker chart with its strict 20 and 22mm split. Integrated-strap mechanics are covered in the smartwatch sizing guide.

Sources

Yema (official), Superman CMM.10 (Steel, Bronze, Gilt) product page, spec block: case 39mm Thickness: 11.30mm Lugs: 19mm 2.20m, thickness 11.30mm Lugs: 19mm 2.20mm double dome sa, lugs 19mm 2.20mm double dome sapphire crystal: yema.com
Yema (official), Superman Heritage product page, spec block: case 39mm, thickness 11.30mm Lugs: 19mm, lugs 19mm: yema.com
Yema (official), Superman Heritage GMT product page, spec block: case 38.5mm, thickness 11.70mm Lugs : 19mm, lugs 19mm: yema.com
Yema (official), Superman Dato CMM.10 product page, spec block: case 39.5mm Thickness: 11.85mm Lugs: 20mm 2.2, thickness 11.85mm Lugs: 20mm 2.20mm double dome sa, lugs 20mm 2.20mm double dome sapphire crystal: yema.com
Yema (official), Superman Slim CMM.20 product page, spec block: case 39mm Thickness: 9.95mm Lugs: 20mm 2.00 m, thickness 9.95mm Lugs: 20mm 2.00 mm double domed s, lugs 20mm 2.00 mm double domed sapphire cryst: yema.com
Yema (official), Superman Worldtime GMT product page, spec block: case 40mm Thickness : 11.50mm Lugs : 20mm Mat, thickness 11.50mm Lugs : 20mm Material : Brushed 3, lugs 20mm Material : Brushed 316L stainless s: yema.com
Yema (official), Superman MoonTide CMM.11 product page, spec block: case 38.5mm Thickness: 11.30mm Lugs: 19mm 2.2, thickness 11.30mm Lugs: 19mm 2.20mm double dome sa, lugs 19mm 2.20mm double dome sapphire crystal: yema.com
Yema (official), Superman Tourbillon CMM.31 product page, spec block: case 43mm Thickness: 11.7mm Lugs: 22mm 2.10 m, thickness 11.7mm Lugs: 22mm 2.10 mm double dome sa, lugs 22mm 2.10 mm double dome sapphire crysta: yema.com
Yema (official), Navygraf (CMM.10, Pearl, Phantom, FSM) product page, spec block: case 39mm Thickness: 11mm Lugs: 19mm 2.50 mm, thickness 11mm Lugs: 19mm 2.50 mm double domed sap, lugs 19mm 2.50 mm double domed sapphire cryst: yema.com
Yema (official), Navygraf Heritage product page, spec block: case 39mm Thickness: 10.85mm Lugs: 19mm Doubl, thickness 10.85mm Lugs: 19mm Double-domed Hesalite, lugs 19mm Double-domed Hesalite crystal: yema.com
Yema (official), Navygraf Marine Nationale (mens) product page, spec block: case 39mm Thickness: 9.85mm Lugs: 19mm Materi, thickness 9.85mm Lugs: 19mm Material : Vertical br, lugs 19mm Material : Vertical brushed 316L st: yema.com
Yema (official), Navygraf PAN Charles de Gaulle product page, spec block: 38.5mm stainless steel super-compressor case Sapphire crystal: yema.com
Yema (official), Flygraf product page, spec block: case 38.50mm Thickness: 8.90mm Lugs: 19mm 2mm, thickness 8.90mm Lugs: 19mm 2mm domed K1 mineral c, lugs 19mm 2mm domed K1 mineral crystal: yema.com
Yema (official), Rallygraf product page, spec block: case 41mm Thickness: 12.50mm Lugs: 20mm Mater, thickness 12.50mm Lugs: 20mm Material: Brushed / p, lugs 20mm Material: Brushed / polished stainl: yema.com
Yema (official), Yachtingraf product page, spec block: case 38.5mm Thickness: 13mm Lugs: 19mm Materi, thickness 13mm Lugs: 19mm Material: Vertical brush, lugs 19mm Material: Vertical brushed 316L sta: yema.com
Yema (official), Granvelle CMM.29 product page, spec block: : yema.com
Yema (official), Granvelle Renaissance product page, spec block: case 37.5mm Thickness: 8.50mm Lugs : 18mm Wei, thickness 8.50mm Lugs : 18mm Weight : 80g Sapphire, lugs 18mm Weight : 80g Sapphire crystal with: yema.com
Yema (official), Skin Diver CMM.20 product page, spec block: case 39.5mm Thickness: 11.5mm Lugs: 20mm 2.20, thickness 11.5mm Lugs: 20mm 2.20 mm double domed s, lugs 20mm 2.20 mm double domed sapphire cryst: yema.com
Yema (official), Skin Diver Slim product page, spec block: case 39mm Thickness: 10mm Lugs: 20mm 2.20 mm, thickness 10mm Lugs: 20mm 2.20 mm double domed sap, lugs 20mm 2.20 mm double domed sapphire cryst: yema.com
Yema (official), YEMA Diver product page, spec block: case 39.5mm Thickness: 11.7mm Lugs: 20mm 2.20, thickness 11.7mm Lugs: 20mm 2.20 mm double dome sa, lugs 20mm 2.20 mm double dome sapphire crysta: yema.com
Yema (official), Pearldiver product page, spec block: case 38mm Thickness : 14mm Lugs : 20mm Materi, thickness 14mm Lugs : 20mm Material : Brushed 316L, lugs 20mm Material : Brushed 316L stainless s: yema.com
Yema (official), Meangraf Super product page, spec block: case 39mm Thickness: 13mm Lugs: 20mm 2.30 mm, thickness 13mm Lugs: 20mm 2.30 mm Domed sapphire c, lugs 20mm 2.30 mm Domed sapphire crystal: yema.com
Yema (official), Yema x Alain Silberstein product page, spec block: case 40mm Thickness: 11mm Lugs: 20mm 2.20 mm, thickness 11mm Lugs: 20mm 2.20 mm double domed sap, lugs 20mm 2.20 mm double domed sapphire cryst: yema.com
Yema (official), Wristmaster Slim product page, spec block: case 39mm Thickness: 9.00mm Lugs: 24mm Raised, thickness 9.00mm Lugs: 24mm Raised sapphire crysta, lugs 24mm Raised sapphire crystal: yema.com
Yema (official), Wristmaster Traveller product page, spec block: case 39mm Thickness: 11.4mm Lugs: 24mm 2.20 m, thickness 11.4mm Lugs: 24mm 2.20 mm double dome sa, lugs 24mm 2.20 mm double dome sapphire crysta: yema.com
Yema (official), Urban Traveller product page, spec block: case 39mm Thickness: 11.4mm Lugs: 24mm 2.60 m, thickness 11.4mm Lugs: 24mm 2.60 mm double domed s, lugs 24mm 2.60 mm double domed sapphire cryst: yema.com
Yema (official), Radiance (womens) product page, spec block: case 24mm x 30mm Thickness: 6.30mm Lugs: 14mm, thickness 6.30mm Lugs: 14mm Material: Polished sta, lugs 14mm Material: Polished stainless steel: yema.com
Yema (official), Femme references (16mm) product page, spec block: : yema.com
Yema (official), Navygraf PAN Charles de Gaulle (39mm) product page, spec block: 39mm brushed 316L stainless steel 2.50 mm K1 mineral crystal: yema.com
Yema (official), Flygraf Bi-Compax French Air Force product page, spec block: case 40mm Thickness: 9.50mm Lugs: 20mm 2,00 m, thickness 9.50mm Lugs: 20mm 2,00 mm hesalite doubl, lugs 20mm 2,00 mm hesalite double dome crysta: yema.com
Yema (official), Superman Titanium MoonTide CMM.11 product page, spec block: case 38.5mm Thickness: 11.30mm Lugs: 19mm 2.2, thickness 11.30mm Lugs: 19mm 2.20mm double dome sa, lugs 19mm 2.20mm double dome sapphire crystal: yema.com
Yema (official), store catalog feed yema.com/products.json, pulled September 2026: 189 products, of which 110 watches, 76 accessories and 3 unclassified; every watch product page was fetched and its spec block read: yema.com
watchbands.ai brands index, pulled fresh at build time: 189 brands listed, Yema present with exactly 1 measured reference (the Sous Marine Tomahawk), no consolidated Yema width table: watchbands.ai
lug2lug.org brand page for Yema, checked at build time: lists Yema models with prices and reviews but prints no lug width anywhere on the page (searched: lug width, band size, strap size, 19mm, 20mm, all zero): lug2lug.org
Barton Watch Bands product pages, the retailer counter-example: sells bands titled for the Yema Superman at a flat 20mm lug width, while the 39mm Superman product pages at yema.com print Lugs: 19mm: bartonwatchbands.com