Match the case size in millimetres and the series. Then choose between TPU film (thin, follows curves, scratch protection only), curved glass made for your exact watch, or a bumper case with a built-in screen cover, which protects the edges that actually take the knocks. Flat glass on a curved watch screen lifts.
Three ways to protect a watch
| Type | Protects against | Pros | Cons |
|---|---|---|---|
| TPU film | Scratches | Near-invisible, follows curves | Little impact protection; can look wavy |
| Curved tempered glass | Scratches, light knocks | Feels like the watch face | Must match the exact model; can lift at the curve |
| Bumper with built-in cover | Edge knocks, scratches | Protects the frame too | Bulkier; changes the look |
By watch
Apple Watch
Series 12, Ultra 4 and SE: sizes and materials.
Read the guide →SamsungGalaxy Watch
Round screens and the raised bezel.
Read the guide →GarminGarmin
Sapphire vs Gorilla Glass editions.
Read the guide →Sapphire changes the calculation
Watches with sapphire crystal, including titanium Apple Watches, Apple Watch Ultra and many premium Garmins, resist scratches far better than ordinary cover glass. On those, a protector is mostly about edge chips from impacts, which a bumper handles better than a film. Aluminium Apple Watches and most mid-range watches use toughened glass instead, and those do pick up scratches from desks and walls.
Questions people ask
Why won't a flat glass protector stick to my watch?
Most watch screens curve at the edge, so flat glass only touches the middle and the edges lift. Use film, curved glass made for your model, or a bumper cover.
Do sapphire watches need a screen protector?
Rarely for scratches. Sapphire resists them well. Edge impacts are the bigger risk, and a bumper is the better answer.