Casio F-91W
An icon for a reason: featherlight, near-indestructible for the price, with a battery that lasts about seven years. It's the classic 'small, funny, thoughtful' gift or stocking filler — nobody expects a watch this cheap to be this beloved.
What’s good
- Around a seven-year battery life — set it and forget it
- Extremely light and durable for the money
- A genuine design icon with a huge following
Worth knowing
- Splash-resistant only — not for swimming
- A small, no-frills digital display; charm over sophistication
| Movement | Digital quartz |
|---|---|
| Case size | 33mm |
| Water resistance | Splash only |
| Crystal | Acrylic |
| Strap | Resin strap |
Good to know. The F-91W has been in continuous production since 1989 and is one of the best-selling watches ever made.
Specs read from the product listing, on July 24, 2026. “Not published” means the brand does not state that figure.




