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Casio spans $20 digitals to tough solar G-Shocks.

This guide is built from Amazon product listings and maker specs, not our own testing, so confirm size, compatibility, features and current price on each product page.

Prices are approximate US dollar conversions of what Amazon showed on October 31, 2026.

Last updated: November 1, 2026.

Quick Picks

Product Type Best for
Casio F-91W Digital watch Cheapest classic
Casio WS1600H Digital sports watch Stopwatch and countdown
Casio LF20W Digital watch Small digital watch
Casio G-Shock GA-2100 Analog-digital G-Shock Slim tough G-Shock
Casio G-Shock GW-M5610U Tough Solar Digital solar watch Square digital classic
Casio Pro Trek PRJ-B001B Tough Solar Outdoor solar watch Light outdoor Pro Trek
Casio Pro Trek PRG600 Outdoor watch with compass Compass and altimeter style

Our Picks

1. Casio F-91W

A Casio F-91W (digital watch), per the listing. It was shown at about $19 on Amazon.com on October 31, 2026.

Good for: Cheapest classic. Watch out: basic.

Check on Amazon

2. Casio WS1600H

A Casio WS1600H (digital sports watch), per the listing. It was shown at about $31 on Amazon.com on October 31, 2026.

Good for: Stopwatch and countdown. Watch out: basic.

Check on Amazon

3. Casio LF20W

A Casio LF20W (digital watch), per the listing. It was shown at about $41 on Amazon.com on October 31, 2026.

Good for: Small digital watch. Watch out: basic.

Check on Amazon

4. Casio G-Shock GA-2100

A Casio G-Shock GA-2100 (analog-digital g-shock), per the listing. It was shown at about $105 on Amazon.com on October 31, 2026.

Good for: Slim tough G-Shock. Watch out: check exact version.

Check on Amazon

5. Casio G-Shock GW-M5610U Tough Solar

A Casio G-Shock GW-M5610U Tough Solar (digital solar watch), per the listing. It was shown at about $138 on Amazon.com on October 31, 2026.

Good for: Square digital classic. Watch out: plain looks.

Check on Amazon

6. Casio Pro Trek PRJ-B001B Tough Solar

A Casio Pro Trek PRJ-B001B Tough Solar (outdoor solar watch), per the listing. It was shown at about $140 on Amazon.com on October 31, 2026.

Good for: Light outdoor Pro Trek. Watch out: check sensors.

Check on Amazon

7. Casio Pro Trek PRG600

A Casio Pro Trek PRG600 (outdoor watch with compass), per the listing. It was shown at about $260 on Amazon.com on October 31, 2026.

Good for: Compass and altimeter style. Watch out: older design.

Check on Amazon

How to Choose

Tough or basic

G-Shock is tougher.

Solar

Tough Solar needs no battery swap.

Style

Analog-digital or digital.

Frequently Asked Questions

Best Casio?

G-Shock GA-2100.

Cheapest?

F-91W.

Solar?

GW-M5610U.

Bottom Line

For style, the GA-2100. For solar, the GW-M5610U. For budget, the F-91W.

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