Amazfit Band Size Chart for Every Model

Amazfit band sizing looks simpler than it is. Most of the lineup does use ordinary 20mm and 22mm quick-release bands, which means the entire standard strap market is open to you. But the exceptions are concentrated in exactly the watches people buy replacement bands for: the T-Rex 3 Pro comes in two case sizes with two different widths, the T-Rex Ultra holds its band on with screws rather than spring pins, the T-Rex Ultra 2 widened to 26mm, and the older T-Rex generations use a connector no standard band fits at all. The chart below covers every family, with the connector type called out per row, because on an Amazfit the connector is the purchase decision, not just the width.

The one-line version: most Amazfit watches take a standard quick-release band, 22mm on the big cases (GTR 47mm, Balance, round Cheetah, T-Rex 3, Bip 5 and newer) and 20mm on the small ones (GTS, GTR 42mm and GTR Mini, Active, Bip through Bip 3). Before buying, check the three trap rows: T-Rex Ultra (screwed bars), T-Rex Ultra 2 (26mm), and Verge (integrated band). The chart shows exactly which is which.

Amazfit band size chart: all models, widths and connectors

Width is the lug width a replacement band must match. Sources per row are in the Sources section; where reputable sources disagree, both positions are shown and flagged, never averaged.

Model familyBand widthConnector
GTR 47 / GTR 2 / GTR 2e / GTR 3 / GTR 3 Pro / GTR 422mmStandard quick-release
GTR 42mm / GTR Mini20mmStandard quick-release
GTS / GTS 2 / 2e / 2 Mini / GTS 3 / GTS 4 / GTS 4 Mini20mmStandard quick-release
Bip / Bip Lite / Bip S / Bip S Lite / Bip U / Bip U Pro / Bip 3 / Bip 3 Pro20mmStandard quick-release
Bip 5 / Bip 5 Unity / Bip 6 / Bip Max22mmStandard quick-release
Active / Active 2 / Active 3 Premium20mmStandard quick-release
Active Max22mmStandard quick-release
Balance / Balance 2 / Balance 3 / Balance Ultra22mmStandard quick-release
Cheetah (round) / Cheetah Pro / Cheetah 2 Ultra22mmStandard quick-release
Cheetah Square / Cheetah 2 Pro20mmStandard quick-release
T-Rex 3 / T-Rex 3 Pro 48mm22mmStandard quick-release
T-Rex 3 Pro 44mm20mmStandard quick-release
T-Rex Ultra22mmScrewed bars, not quick-release
T-Rex Ultra 226mmProprietary QuickFit-style, not quick-release
T-Rex / T-Rex Pro / T-Rex 222mmProprietary connector, standard bands do not fit
Falcon22mmStandard quick-release
Stratos / Stratos+ / Stratos 2 / 2S / Stratos 3 (and Pace)22mmStandard quick-release
Pop / Pop Pro (and Pop 2)20mmStandard quick-release
Verge / Verge Lite22mmIntegrated band, not designed to be replaceable *

* The Verge row is the one outright divergence in Amazfit paperwork and its coverage: accessory retailer nothingbutbands states the Verge and Verge Lite bands are built into the case and cannot take a replacement at all, while the band marketplace ecosystem around these 2018-2019 watches tells a different story. Amazfit's own product page calls the Verge Lite wristband non-detachable, but the Verge itself shipped with 22mm quick-release pins per multiple third-party listings and reviews (the5krunner and 91mobiles both describe standard spring-bar attachment), and quick-release Verge bands were sold openly. The honest summary: the Verge was a 22mm quick-release watch; the Verge Lite's own manual says non-detachable, yet reviews and listings describe its strap as replaceable too. If you own one, look at the case before ordering: if you see spring bars in lugs, a 22mm quick-release band fits; if the band is fused to the case, it is not replaceable, exactly as nothingbutbands warns.

Two more rows carry footnotes in the fine print sense. The T-Rex 3 Pro split is new enough that most accessory listings have not caught up: Amazfit's own strap compatibility lists put "T-Rex 3 Pro 48mm" on the 22mm side and "T-Rex 3 Pro 44mm" on the 20mm side, and the5krunner.com's T-Rex 3 Pro spec sheet confirms the 44mm model differs on strap width (20mm). And the T-Rex Ultra row says 22mm, which sounds interchangeable with every other 22mm watch on this page; it is not, because the mounting is screws. That is the next section.

Connector traps: where Amazfit breaks the quick-release rule

Four traps account for nearly every mis-ordered Amazfit band. None of them show up in a width-only chart, which is why the connector column exists:

One non-trap worth naming: the Cheetah line splits by case shape, round versus square, with the round Cheetah, Cheetah Pro, and Cheetah 2 Ultra on 22mm and the Cheetah Square and Cheetah 2 Pro on 20mm. That is a normal width split, not a connector trap; every Cheetah uses the same spring-bar quick-release mechanism regardless of width. If you are unsure which Cheetah you own, the case shape is the fastest tell: round cases take 22mm, square cases take 20mm, and the model name is also printed in the watch's settings menu.

What quick-release actually means here (and how to swap)

On the rows marked standard quick-release, Amazfit uses the same system as most of the traditional watch world: a spring bar with a loaded pin that depresses with a fingertip or a spring bar tool's fork end. Any band of the correct width with quick-release pins fits, whatever the brand; the connector is universal, not Amazfit-specific. The swap itself takes seconds and no tools, and the full walkthrough, including the tool and the no-tool method, is in the spring bar tool guide. If your Amazfit shipped with standard screw-fixed bars instead (some leather and nylon originals do), the pin-end technique in the same guide, plus a 1.4mm flat or Torx driver for the factory screws, is the routine.

Not sure your Amazfit is even the model you think it is? The model name is printed in the watch's settings menu (Settings, then About or System), which matters more on this brand than most because the width splits run inside families: Bip 3 at 20mm versus Bip 5 at 22mm, GTR 42mm at 20mm versus GTR 47mm at 22mm, Cheetah Square at 20mm versus round Cheetah at 22mm. A 30-second check beats a mis-ordered band, and a 20mm band will physically not seat in a 22mm lug channel.

How to measure your Amazfit lug width if it is not listed

For any Amazfit not in the chart (regional variants, future releases), the width is measurable in one minute: pop one end of the stock band's spring bar, and measure the gap between the inside faces of the two lugs with a ruler or calipers. That gap, in millimeters, is the band width to buy. The full method with photos-level detail, including what to do when the lugs are curved, is in the lug width chart. The wrist measuring guide covers the other half of the purchase: whether the band's length range actually fits your wrist, since Amazfit's own nylon straps, for instance, span 140-210mm in 22mm and 135-195mm in 20mm.

Related guides

For the same treatment of other smartwatch lines, see the Garmin band size guide (QuickFit versus quick-release, the closest cousin to Amazfit's connector confusion), the Galaxy Watch band size chart, the all-model Fitbit band size chart, the COROS band size chart (its Vertix 26mm jump and Pace 1 screw pins are the same class of trap as Amazfit's), the Apple Watch band size guide, and the Fossil smartwatch band size guide. The general system all of these build on is in the watch band size chart and the lug width chart by brand; swapping technique is in the spring bar tool guide, and whether a 44mm case suits your wrist at all is a separate question in case size by wrist and smartwatch sizing.

Sources