Fitbit Activity Trackers
Fitbit Sense Advanced Unisex Smartwatch
size: One Size. Colour: Sage Grey / Silver.
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Offer checked 13 November 2026. Price and availability may change.
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Size and fit
This is the One Size option. Match it to the size you need, and check the manufacturer's measurements if you're switching models or brands.
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| Product | Size | Shop the option |
|---|---|---|
 This optionFitbit Sense Advanced Unisex Smartwatch | One Size | £99.99View on Amazon |
| — | Check retailer priceView on Amazon | |
| One Size | Check retailer priceView on Amazon | |
| One size | £9.99View on Amazon |
- This option
Fitbit Sense Advanced Unisex Smartwatch
- Size
- One Size
£99.99View on Amazon - Size
- Not supplied
Check retailer priceView on Amazon- Size
- One Size
Check retailer priceView on Amazon- Size
- One size
£9.99View on Amazon
The exact specification
Product details
- Size
- One Size
- Colour
- Sage Grey / Silver
Full listing and model details
- Retailer listing
- Fitbit Sense Advanced Unisex Smartwatch with Tools for Heart Health, Stress Management & Skin Temperature Trends, Sage Grey / Silver
- Brand
- Fitbit
- Model
- FB512SRSG
- Condition
- New
- ASIN
- B09B7W8K38
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- size
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- Colour
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- Model
- FB422BKBK
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Sources & our approach
Product details come from the retailer’s listing, checked 13 November 2026. Our buying notes explain the listed differences and questions to resolve before ordering. We have not handled or tested this product.
Our editorial approach