Fitbit Watch Strap Sizes
Lug width and strap fitting for every Fitbit model in our index. Tap a watch for the full guide.
the Versa 4 uses an integrated or proprietary fitting, so normal straps need an adapter (how that works).
Fitbit lug width chart
| Model | Reference | Strap size | Case | Lug-to-lug |
|---|---|---|---|---|
| Versa 4 | FB523 | Integrated | 40.5mm | — |
Strap size = lug width. Not sure which model you have? Measure it or see the strap size chart for every brand.