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Model guide · 11 models · Casio specs with sources

G-SHOCK models compared

Short answer

The thinnest G-SHOCKs here are the GA-2100 and GM-2100 at 11.8 mm, and the lightest is the GA-2100 at 51 g. The GA-V01 has the longest battery (about 10 years), while the GA-B2100, GW-6900, GW-M5610 and GMW-B5000 charge from light. Every model is rated 200 m water resistant.

Size, weight and power by model

Stock Casio reference specifications. Open a model for its full guide, common questions and the watches we carry.

G-SHOCK models compared by size, weight, power and features
ModelDisplayCase (L × W × H)WeightPowerSolar · Atomic · BluetoothCasio list priceIn our store
GA-2100 (CasiOak)Analog-digital48.5 × 45.4 × 11.8 mm51 g3-year battery—$11064 from $105
GA-B2100 (Solar CasiOak)Analog-digital48.5 × 45.4 × 11.9 mm52 gSolar, ~7 mo per chargeSolar · Bluetooth$165—
GM-2100Analog-digital49.3 × 44.4 × 11.8 mm72 g3-year battery—$2208 from $149
GW-6900Digital53.2 × 50 × 17.7 mm63 gSolar, ~9 mo per chargeSolar · Multi-Band 6$1558 from $120
GA-700Analog-digital57.5 × 53.4 × 18.4 mm69 g5-year battery—$1106 from $105
DW-5600Digital48.9 × 42.8 × 13.4 mm52 g2-year battery—$99.952 from $120
DW-6900Digital53.2 × 50 × 18.7 mm67 g2-year battery—$99.95—
GW-M5610Digital46.7 × 43.2 × 12.7 mm51.7 gSolar, ~10 mo per chargeSolar · Multi-Band 6$165—
GMW-B5000Digital49.3 × 43.2 × 13 mm167 gTough SolarSolar · Multi-Band 6 · Bluetooth$6004 from $280
GA-V01Analog-digital49.1 × 58.2 × 19.6 mm74 g10-year battery—$1554 from $110
G-7900Digital52.4 × 50 × 17.7 mm68.2 g2-year battery—$1201 from $150

Which G-SHOCK should you pick?

Thinnest and best for small wrists

The GA-2100 and GM-2100 are the thinnest models here at 11.8 mm; the GA-2100 is also only 45.4 mm wide and 51 g. The DW-5600 is narrower at 42.8 mm but thicker at 13.4 mm.

Never change a battery

The GA-B2100, GW-6900, GW-M5610 and GMW-B5000 use Tough Solar, which recharges from sunlight or indoor light. The GMW-B5000 also sets itself by radio and syncs with your phone.

Longest battery without solar

The GA-V01 runs about 10 years on one battery, according to Casio. The GA-700 follows at about 5 years.

Heaviest and most premium

The GMW-B5000 is full stainless steel at 167 g, more than three times the weight of a resin DW-5600, with a Casio U.S. list price of $600.

Sources

  1. Casio: GA-2100-1A specifications (official Casio, accessed October 25, 2026)
  2. Casio G-SHOCK (U.S.): GA2100: Slim & Tough Analog-Digital Watches (official Casio, accessed October 25, 2026)
  3. Casio: GA-2100K-1A specifications (battery, band size) (official Casio, accessed October 25, 2026)
  4. G-Central: G-SHOCK GA-2100 specifications (independent reference, accessed October 25, 2026)
  5. Casio G-SHOCK (UK): Are G-SHOCK watches waterproof or water resistant? (official Casio, accessed October 25, 2026)
  6. Casio (U.S.): GA-B2100-1A specifications (official Casio, accessed October 25, 2026)
  7. Casio (UK): GA-B2100-1A1 specifications (app features, band size) (official Casio, accessed October 25, 2026)
  8. G-Central: G-SHOCK GA-B2100 specifications (independent reference, accessed October 25, 2026)
  9. G-Central: G-Shock GA-B2100 with Tough Solar power and Bluetooth link (independent reference, accessed October 25, 2026)
  10. Casio G-SHOCK (UK): How do solar powered watches work? (official Casio, accessed October 25, 2026)
  11. Casio (U.S.): GM-2100-1A steel bezel watch (official Casio, accessed October 25, 2026)
  12. Casio (Canada): GM-2100-1A specifications (battery) (official Casio, accessed October 25, 2026)
  13. G-Central: G-SHOCK GM-2100 specifications (independent reference, accessed October 25, 2026)
  14. G-Central: G-SHOCK GM-B2100 (full metal) specifications (independent reference, accessed October 25, 2026)
  15. G-Central: G-SHOCK GW-6900 specifications (independent reference, accessed October 25, 2026)
  16. Casio (U.S.): GW-6900U-1 specifications (official Casio, accessed October 25, 2026)
  17. Casio (U.S.): G-SHOCK 6900 series (official Casio, accessed October 25, 2026)
  18. Hahn's World of Surplus & Survival: Casio G-SHOCK GW-6900-1 listing (Casio spec sheet) (retailer listing of Casio's spec, accessed October 25, 2026)
  19. NIST: Help with WWVB radio controlled clocks (independent reference, accessed October 25, 2026)
  20. Casio (U.S.): GA-700BNR-1A specifications (GA-700 case) (official Casio, accessed October 25, 2026)
  21. Casio (U.S.): GA-700-1B analog-digital watch (official Casio, accessed October 25, 2026)
  22. G-Central: G-SHOCK GA-700 specifications (independent reference, accessed October 25, 2026)
  23. Casio (Europe): DW-5600E-1V specifications (official Casio, accessed October 25, 2026)
  24. Casio (U.S.): Classic G-SHOCK DW5600E-1V (official Casio, accessed October 25, 2026)
  25. G-Central: G-SHOCK DW-5600 specifications (independent reference, accessed October 25, 2026)
  26. Casio (Europe): GW-M5610U-1 (DW-5000C design legacy) (official Casio, accessed October 25, 2026)
  27. G-Central: G-SHOCK GW-M5610 specifications (independent reference, accessed October 25, 2026)
  28. G-Central: G-SHOCK DW-6900 specifications (independent reference, accessed November 10, 2026)
  29. Casio: Operation Guide 3230/3232 (DW-6900) (official Casio, accessed November 10, 2026)
  30. Casio (Singapore): GW-M5610-1 specifications (official Casio, accessed October 25, 2026)
  31. Casio (Europe): GW-M5610-1 battery operating time (official Casio, accessed October 25, 2026)
  32. Casio (U.S.): GMW-B5000D-1 stainless steel square watch (official Casio, accessed October 25, 2026)
  33. Casio (Middle East & Africa): GMW-B5000D-1 full metal construction (official Casio, accessed October 25, 2026)
  34. G-Central: G-SHOCK GMW-B5000 specifications (independent reference, accessed October 25, 2026)
  35. WatchReport: Casio G-Shock GMWB5000D-1 hands-on review (Casio spec) (independent reference, accessed October 25, 2026)
  36. Casio (UK): GA-V01-1A (10-year battery) (official Casio, accessed October 25, 2026)
  37. Casio (Europe): GA-V01CMG-6A specifications (GA-V01 case) (official Casio, accessed October 25, 2026)
  38. G-Central: G-SHOCK GA-V01 specifications (independent reference, accessed October 25, 2026)
  39. G-Central: G-SHOCK G-7900 specifications (independent reference, accessed October 25, 2026)