Which Watch Band Length Do You Need?
Buying a new watch band? Choosing the correct size is essential for comfort and security. If you didn’t note your size when purchasing your smartwatch, use this guide to measure your wrist and find the right band length for Apple Watch, Samsung Galaxy Watch, and Fitbit.
How Do I Measure My Wrist Size?
The standard wrist size ranges are:
| Category | Wrist Size |
|---|---|
| Women | 14–19 cm (140–190 mm) |
| Men | 17–25 cm (170–250 mm) |
To be sure, measure your wrist circumference:
Using a Measuring Tape
- Wrap the soft measuring tape around your wrist (below the wrist bone).
- Read the value where the tape meets the end.
Using a String
- Wrap a piece of string around your wrist.
- Mark where the string overlaps with a pen or pencil.
- Lay the string flat against a ruler to read the length.
Once you know your wrist size, you can select the correct band length for your watch.
Which Smartwatch Model Do You Have?
Band sizing varies by brand and even by model. Use the brand sections below to match your watch to the right band size.
Apple Watch Sizes
Apple Watch (iWatch) models come in multiple case sizes. Use the table below to identify your watch:
| Model | Case Size |
|---|---|
| Apple Watch Series 1 | 38mm or 42mm |
| Apple Watch Series 2 | 38mm or 42mm |
| Apple Watch Series 3 | 38mm or 42mm |
| Apple Watch Series 4 | 40mm or 44mm |
| Apple Watch Series 5 | 40mm or 44mm |
| Apple Watch Series 6 | 40mm or 44mm |
| Apple Watch SE | 40mm or 44mm |
| Apple Watch Series 7 | 41mm or 45mm |
Which bands fit the models above? Band widths correspond to the case size. For example, Series 1–3 use 38/42mm, Series 4–6 and SE use 40/44mm, and Series 7 uses 41/45mm. Always select the band made for your watch’s case size.
Samsung Smartwatch Sizes
Samsung also offers multiple case sizes. Below is a quick overview:
Small (170–200 mm wrist)
- Samsung Galaxy Watch 42mm
- Samsung Galaxy Watch Active (42mm)
- Samsung Galaxy Watch Active2 (42mm)
- Samsung Gear Sport (42mm)
Use Samsung Galaxy Watch 42mm bands for these models. Larger bands will not fit.
Large (190–220 mm wrist)
- Samsung Galaxy Watch 46mm
- Samsung Gear S3 Classic (46mm)
- Samsung Gear S3 Frontier (46mm)
Use Samsung Galaxy Watch 46mm bands for these models. Smaller bands will not fit.
Shop Samsung Galaxy Watch bands.
Fitbit Watch Sizes
Fitbit bands commonly come in Small (S) and Large (L). Use the tables below to match your wrist size.
Fitbit Versa (Versa, Versa 2, Versa Special, Versa Lite)
| Size | Wrist Circumference |
|---|---|
| Small (S) | 139–180 mm |
| Large (L) | 180–226 mm |
Fitbit Charge 3
| Size | Wrist Circumference |
|---|---|
| Small (S) | 139–180 mm |
| Large (L) | 180–220 mm |
Fitbit Inspire / Inspire HR
| Size | Wrist Circumference |
|---|---|
| Small (S) | 139–180 mm |
| Large (L) | 180–220 mm |
See Fitbit bands in our collection.
Tips Before You Buy
- Match the band to your case size. Apple (mm), Samsung (42/46mm), Fitbit (S/L).
- Measure your wrist. If you’re between sizes, choose the larger band or one with more adjustability (e.g., Velcro or magnetic clasp).
- Consider your use case. Sports (silicone/nylon), daily casual (silicone/nylon/leather), formal (leather/stainless steel).
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