Fitbit Watch Specifications: Compare Sizes & Check Wrist Fit
Browse every Fitbit model in our database. View detailed specifications, compare dimensions, and find the right watch for your wrist.
Fitbit Watch Models & Specifications
Browse all 10 Fitbit models with full case dimensions. Click any row to expand detailed specs and find purchase links — or use the Fit Tool button to check how a watch looks on your wrist, and the Compare button to compare watch sizes side by side.
Smallest Fitbit Watches
The most compact Fitbit models by case width
- 1
Ionic38.6mm wide - 2
Versa 240mm wide - 3
Versa Lite40mm wide - 4
Versa40mm wide - 5
Versa 440.4mm wide
Thinnest Fitbit Watches
The slimmest Fitbit profiles by case thickness
- 1Versa Lite11.2mm thick
- 2Versa11.2mm thick
- 3Versa 212mm thick
- 4Ionic12.2mm thick
- 5Versa 412.3mm thick
Best Fitbit for Small Wrists
Models with lug-to-lug under 46mm for smaller wrist sizes
- 1Versa 240mm lug-to-lug
- 2Versa Lite40mm lug-to-lug
- 3Versa40mm lug-to-lug
- 4Versa 440.4mm lug-to-lug
- 5
Sense40.4mm lug-to-lug
Fitbit Watch Size Guide
Fitbit offers watches ranging from 38.6mm to 42mm in case width and 11.2mm to 13.35mm in thickness. Our database covers 10 models.
When choosing a Fitbit watch, focus on the lug-to-lug measurement — it determines how much of your wrist the watch will cover. A watch whose lugs extend past the edges of your wrist will look oversized and feel uncomfortable. Use the wrist fit visualization tool to check before you buy.
Smallest Fitbit
Ionic
38.6mm
Largest Fitbit
Blaze
42mm
Thinnest Fitbit
Versa Lite
11.2mm thick
Browse Fitbit Watches by Size
How to Choose the Right Fitbit Watch Size
- Measure your wrist — Wrap a measuring tape around your wrist just below the wrist bone. Note the circumference in millimeters. See our measurement guide.
- Check lug-to-lug — Compare the watch's lug-to-lug distance against your wrist width using our interactive watch fit tool. It should be equal to or slightly less than your wrist width for the best fit.
- Consider thickness — Thicker watches sit higher on the wrist and may catch on sleeves. If you wear dress shirts, look for models under 12mm.
- Use our comparison tool — Add any Fitbit watch to the interactive size comparison to see it overlaid on your wrist size.