Bonest Gatti band size chart by model

Bonest Gatti is the brand where the strap width ignores the strap industry. We read the spec line on every watch in the maker's own feed, 90 rows [18], and got twelve different widths between 12mm and 30mm. Only 36 of 89 models take a width you will find in a default strap dropdown; the other 53 print 21, 23, 24, 25, 26, 27 or 30mm. The biggest single class is 22mm [18], but the tonneau skeletons pile into 26mm [12], 27mm [13] and 30mm [14], widths most strap shops do not stock at all.

Quick answers: the BG40xx, BG5xxx and BG8xxx round watches mostly take 22mm or 21mm. The BG99xx carbon tonneaus take 30mm or 26mm. The BG56xx, BG58xx, BG66xx and BG60xx crystal skeletons take 27mm. BG4001, BG4005, BG4601, BG5501, BG5502 and BG7007 take 23mm. BG5005, BG5006 and BG9004 take 24mm. BG8007 alone takes 25mm. The women's line takes 12mm (BG3004), 13mm (BG3007) or 18mm (BG3003, BG3006, BG8902). BG9916 is 26mm.

The chart: twelve widths, 89 models, every number from the maker's own pages

WidthModelsTypical caseMembersWatch out
22mm26Round 42 to 45mmBG4002, BG4003, BG5001, BG5003, BG5004, BG5101, BG5701, BG5801, BG5802, BG5803, BG5808, BG7002, BG7004, BG7601, BG7701, BG7702, BG8002, BG8010, BG8016, BG8601, BG8801, BG8802, BG8803, BG9006, BG9601, BG9907the default guess, and right for most round skeletons; but two tonneaus (BG9006, BG9907) sit here too, so shape alone does not decide
26mm14Tonneau 42 to 45mmBG6004, BG7005, BG8012, BG8014, BG9001, BG9002, BG9003, BG9005, BG9007, BG9009, BG9910, BG9916, BG9920, BG9980the biggest tonneau class; BG9916 prints 26mm [11], not the 23mm its BG-number neighbors suggest, and the women's BG9910 takes the same 26mm on a 35mm dial [10]
27mm11Crystal and tonneau 44 to 46mmBG5601, BG5602, BG5806, BG5807, BG6001, BG6002, BG6601, BG7001, BG8013, BG9908, BG9960the Ghost Speed pair BG5601 and BG5602 [13] and the K9 crystal cases; nothing in a standard strap catalog matches 27mm without going custom
30mm8Carbon tonneau 42 to 45mmBG9008, BG9901, BG9902, BG9903, BG9904, BG9905, BG9906, BG9909the widest class in the catalog; BG9906 [14] and BG9008 [15] both print it, and a 30mm two-piece strap is a specialty order almost everywhere
21mm10Round 40 to 43mmBG5002, BG5605, BG6009, BG7006, BG8003, BG8004, BG8006, BG8018, BG8019, BG9012the classic odd width: the BG8019 [6] squeezes the same squeeze-or-gap dilemma as a 19mm watch, one step up
23mm6Square and round 42 to 46mmBG4001, BG4005, BG4601, BG5501, BG5502, BG7007a real class, not a typo: BG4001 prints 23 mm with a space [7], and six models agree on it
20mm5Round 39 to 47mmBG8001, BG8015, BG8701, BG9010, BG9014rare in this catalog; BG8001 [4] is the submariner-style exception, BG8701 [16] puts 20mm on the biggest dial in the catalog (47mm), and BG9014 prints it as Bracelet width [5]
24mm3Tonneau 46 to 47mmBG5005, BG5006, BG9004BG5006 [8] shares 24mm with the moon-phase and horse-motif tonneaus
18mm3Women's 35 to 36mmBG3003, BG3006, BG8902the women's automatics; BG8902 [3] states 18mm on a 36mm dial
25mm1Round 42mmBG8007a class of exactly one: BG8007 [9] is the only 25mm in the feed
13mm1Women's 22mm dialBG3007the mother-of-pearl square [2], and the only 13mm
12mm1Women's 37mm dialBG3004the animated-dial quartz [1]; 12mm ribbon and leather straps are jewelry-size, order deliberately

Dial size will not save you

The trap in this catalog is that the dial diameter and the strap width move independently. The BG8012 Guilloché Business is a 39mm dial carrying a 26mm strap [17]; the BG8701 is a 47mm dial carrying 20mm [16]; the women's BG9910 is a 35mm dial carrying 26mm [10]. If you order by the rule of thumb that a 40mm watch takes a 20mm strap, you will be wrong on more than half this catalog. The model number is the only reliable key, and the table above is keyed to it.

Where the big widths live: the tonneau wall

Twenty-five of the thirty-six tonneau-case models print 26mm, 27mm or 30mm. The BG99xx carbon fiber tonneaus run 30mm [14] and 26mm [12], the crystal-case skeletons run 27mm [13], and the Ghost Speed pair runs 27mm [13] on 46mm dials. These are not measurement errors: every one of those numbers is a verbatim Strap Width line on the maker's own product page, in a spec block that reads Case Thickness, then Strap Width, then Dial Diameter, like the BG9920: Case Shape: Tonneau Case Thickness: 16 mm Strap Width: 26 mm Dial Diameter: 45 mm [12]. If you own one of these and the strap cracked, the measurement to quote to a strap maker is the lug gap, and it is almost certainly one of those three numbers.

One label, one exception

Unlike catalogs that spell the width six ways, Bonest Gatti is consistent: 88 of the 89 stated rows print exactly Strap Width: NN mm. The single exception is the BG9014 chronograph, whose page writes Case dimensions: 41 mm wide × 13 mm thick Bracelet width: 20 mm [5]. That line is also the trap test for this page: 41 and 13 are case numbers, 20 is the strap number, and the label that owns it is Bracelet width, not Strap Width. The census counted it under its own label and excluded the case-dimension pair.

Traps inside the spec block

Every product page prints the width sandwiched between two other millimeter measurements: Case Thickness: 12mm Strap Width: 12mm Dial Diameter: 37mm on the BG3004 [1]. A parser, or a tired human, that grabs the nearest number to the word width can pocket the thickness on the left or the dial on the right. On the women's BG3007 the block reads Case Thickness: 7mm Strap Width: 13mm Dial Diameter: 22mm [2]: three numbers, none equal. This chart takes only the number immediately owned by the Strap Width label, on every row.

The women's line: 12, 13 and 18mm

The five women's models print the three smallest widths in the catalog: 12mm on the BG3004 [1], 13mm on the BG3007 [2], and 18mm on the BG3003, BG3006 and BG8902 [3]. None of these is interchangeable, and 12mm and 13mm straps skew jewelry-grade (ribbon, thin leather), so check the strap material line on the product page before substituting a generic 14mm band that will not fold through the 12mm lug gap.

What Bonest Gatti does not state

One row in the feed is not a watch: the BG9906-L/BG3003 dedicated rubber strap SKU prints no width of its own, and we exclude it from the census rather than backfill the width of the watches it fits. The brand's collection page [23] offers no width filter and no size chart, which is why this page exists. All quotes on this page come from bonestgattiwatches.com product pages; the maker's other domains are not cited.

How we verified this

We pulled the maker's catalog feed, 90 rows, on 2 October 2026 [18], classified every row, excluded the one strap SKU by title, and read the width line under both label forms the brand uses (Strap Width on 88 rows, Bracelet width on the BG9014). Seven product pages, including one from every width class at 26mm and above, were re-pulled as rendered pages and their spec lines matched verbatim [12]. Numbers that are not strap widths, the case-thickness and dial-diameter neighbors and the BG9014's case-dimension pair, were excluded by label ownership. Incumbents checked at build: the watchbands.ai brand index lists its brands with Seiko, Citizen and Rolex present and Bonest Gatti absent [19]; watchpolice returns a Temporarily unavailable shell for the brand [20] and its 950-brand sitemap does not carry it [21]; roveplus.com carries 83 per-model Bonest Gatti pages with lug-width fields [22] but no consolidated chart for the brand; no strap-width chart for Bonest Gatti surfaced in search at build. Every figure on this page traces to the maker's own pages.

Related guides

The lug width chart by brand places Bonest Gatti's 26 to 30mm classes beside every other brand on this site, and the master band size chart indexes them all. For the same odd-width problem one size down, the Addiesdive chart covers a catalog whose 36mm watches take 19mm, and the Out of Order chart covers a maker that states the same measurement eight ways. Once the width is settled, the watch strap taper chart decodes the second number in listings like 22/20.

Sources

  1. Bonest Gatti (official), BG3004 Animated Dial Quartz women's watch product page, spec block: Case Thickness: 12mm Strap Width: 12mm Dial Diameter: 37mm: bonestgattiwatches.com
  2. Bonest Gatti (official), BG3007 Square Women's Mother of Pearl watch product page, spec block: Case Thickness: 7mm Strap Width: 13mm Dial Diameter: 22mm: bonestgattiwatches.com
  3. Bonest Gatti (official), BG8902 Automatic women's watch product page, spec block: Case Thickness: 15mm Strap Width: 18mm Dial Diameter: 36mm: bonestgattiwatches.com
  4. Bonest Gatti (official), BG8001 Submariner Style Automatic product page, spec block: Case Thickness: 14mm Strap Width: 20mm Dial Diameter: 42mm: bonestgattiwatches.com
  5. Bonest Gatti (official), BG9014 Carbon Fiber Skeleton Chronograph product page, spec block: Case dimensions: 41 mm wide × 13 mm thick Bracelet width: 20 mm: bonestgattiwatches.com
  6. Bonest Gatti (official), BG8019 Skeleton Automatic Multifunctional product page, spec block: Case Thickness: 13mm Strap Width: 21mm Dial Diameter: 40mm: bonestgattiwatches.com
  7. Bonest Gatti (official), BG4001 Square Skeleton Automatic product page, spec block: Case Thickness: 13 mm Strap Width: 23 mm Dial Diameter: 42 mm: bonestgattiwatches.com
  8. Bonest Gatti (official), BG5006 Luminous Horse Motif product page, spec block: Case Thickness: 14mm Strap Width: 24mm Dial Diameter: 47mm: bonestgattiwatches.com
  9. Bonest Gatti (official), BG8007 Skeleton Automatic Mechanical product page, spec block: Case Thickness: 12mm Strap Width: 25mm Dial Diameter: 42mm: bonestgattiwatches.com
  10. Bonest Gatti (official), BG9910 Tonneau Crystal Mechanical women's watch product page, spec block: Case Thickness: 15mm Strap Width: 26mm Dial Diameter: 35mm: bonestgattiwatches.com
  11. Bonest Gatti (official), BG9916 Carbon Fiber Automatic product page, spec block: Case Thickness: 16mm Strap Width: 26mm Dial Diameter: 44mm: bonestgattiwatches.com
  12. Bonest Gatti (official), BG9920 K9 Crystal Skeleton Tonneau product page, spec block: Case Thickness: 16 mm Strap Width: 26 mm Dial Diameter: 45 mm: bonestgattiwatches.com
  13. Bonest Gatti (official), BG5601 Skeleton Automatic Tonneau (Ghost Speed) product page, spec block: Case Thickness: 15mm Strap Width: 27mm Dial Diameter: 46mm: bonestgattiwatches.com
  14. Bonest Gatti (official), BG9906 Carbon Fiber Skeleton Tonneau product page, spec block: Case Thickness: 15mm Strap Width: 30mm Dial Diameter: 44mm: bonestgattiwatches.com
  15. Bonest Gatti (official), BG9008 Black Knight Carbon Fiber Tonneau product page, spec block: Case Thickness: 15mm Strap Width: 30mm Dial Diameter: 42mm: bonestgattiwatches.com
  16. Bonest Gatti (official), BG8701 Skeleton Automatic Date product page, spec block: Case Thickness: 15mm Strap Width: 20mm Dial Diameter: 47mm: bonestgattiwatches.com
  17. Bonest Gatti (official), BG8012 Guilloché Business Automatic product page, spec block: Case Thickness: 12mm Strap Width: 26mm Dial Diameter: 39mm: bonestgattiwatches.com
  18. Bonest Gatti (official), store catalog feed bonestgattiwatches.com/products.json, pulled 2 October 2026: 90 rows, of which 89 watch rows print a width line (88 as Strap Width, 1 as Bracelet width) and 1 strap SKU states none; row distribution 22mm x26, 26mm x14, 27mm x11, 30mm x8, 21mm x10, 23mm x6, 20mm x5, 24mm x3, 18mm x3, 13mm x1, 12mm x1, 25mm x1: bonestgattiwatches.com
  19. watchbands.ai brands index (root-relative brand slugs at build; controls Seiko, Citizen, Rolex present; Bonest Gatti absent by slug and whole-word): watchbands.ai
  20. watchpolice.com/brands/bonest-gatti at build returns a 200 shell reading Temporarily unavailable with zero lug-width mentions in a case-insensitive read of the raw page: watchpolice.com
  21. watchpolice.com brands sitemap (950 brand slugs at build; controls Seiko, Rolex, Audaz present; bonest-gatti absent): watchpolice.com
  22. roveplus.com carries 83 per-model Bonest Gatti explore pages with a Lug Width field each (spot-checked values agree with the maker feed) but no consolidated brand chart: roveplus.com
  23. Bonest Gatti (official), All Watches collection page, which filters by price and material and offers no width filter or size chart: bonestgattiwatches.com