Comparison · Reviewed
GA-2100 vs GA-700: Slim CasiOak or Large Statement Watch?
Verdict
Choose the GA-2100 for a slim 11.8 mm octagon that suits most wrists; choose the GA-700 for a large 18.4 mm statement case and a longer five-year battery.
GA-2100 vs GA-700 side by side
Casio's specifications for the stock GA-2100-1A1 and GA-700-1B.
| GA-2100 | GA-700 | |
|---|---|---|
| Display | Analog-digital | Analog-digital |
| Shape | Octagonal | Large rounded case with a front button at 6 o'clock |
| Case size (L × W × H) | 48.5 × 45.4 × 11.8 mm | 57.5 × 53.4 × 18.4 mm |
| Thickness | 11.8 mm | 18.4 mm |
| Weight | 51 g (1.8 oz) | 69 g (2.4 oz) |
| Case | Carbon fiber–reinforced resin (Carbon Core Guard) | Resin |
| Water resistance | 200 m / 20 bar | 200 m / 20 bar |
| Power | Battery: SR726W × 2, about 3 years | Battery: CR2016, about 5 years |
| Tough Solar | No | No |
| Multi-Band 6 | No | No |
| Bluetooth | No | No |
| Module | 5611 | 5522 |
| Launched | 2019 | 2017 |
| Casio U.S. list price | $110 | $110 |
Which one should you buy?
Choose the GA-2100 if
- You want a slim watch for daily wear and shirt cuffs.
- You have a small or medium wrist.
- You want the CasiOak style.
Choose the GA-700 if
- You have a larger wrist and want presence.
- You want a five-year battery instead of three.
- You like a front button at 6 o'clock and a big, legible dial.
What the GA-2100 and GA-700 have in common
- Both are analog-digital.
- Both are rated 200 m water resistant.
- Both share a $110 U.S. list price for the basic black reference.
GA-2100 vs GA-700: questions
How much bigger is the GA-700?
It is 57.5 × 53.4 × 18.4 mm against 48.5 × 45.4 × 11.8 mm for the GA-2100, and 18 g heavier (69 g vs 51 g).
Not sure? Send us your wrist size and how you'll wear it; a person replies.
Sources
- Casio: GA-2100-1A specifications (official Casio, accessed October 25, 2026)
- Casio G-SHOCK (U.S.): GA2100: Slim & Tough Analog-Digital Watches (official Casio, accessed October 25, 2026)
- Casio: GA-2100K-1A specifications (battery, band size) (official Casio, accessed October 25, 2026)
- G-Central: G-SHOCK GA-2100 specifications (independent reference, accessed October 25, 2026)
- Casio G-SHOCK (UK): Are G-SHOCK watches waterproof or water resistant? (official Casio, accessed October 25, 2026)
- Casio (U.S.): GA-B2100-1A specifications (official Casio, accessed October 25, 2026)
- Casio (U.S.): GA-700BNR-1A specifications (GA-700 case) (official Casio, accessed October 25, 2026)
- Casio (U.S.): GA-700-1B analog-digital watch (official Casio, accessed October 25, 2026)
- G-Central: G-SHOCK GA-700 specifications (independent reference, accessed October 25, 2026)