Casio
G-Shock GBA-900
Ref. GBA-900-1A
- Case diameter
- 48.9 mm
- Manufacturer spec
- Lug-to-lug
- 51.3 mm
- Manufacturer spec
- Thickness
- 16.6 mm
- Manufacturer spec
- Lug width
- —
- Not published
Retail price $140 (US, Oct 2026)
Snug, lugs near the edge
How the G-Shock GBA-900 wears
Its lugs add only 2.4 mm to the 48.9 mm case, against 7 mm typical across the almanac, so it wears smaller than its diameter suggests.
On our fit model it sits best on wrists from 7.25" to 8.5" (18.4–21.6 cm); below 7.25" the lugs start to reach the edge of the wrist.
At 16.6 mm thick it is thicker than 85% of the 26 other digital watches we've measured, so expect it to sit tall on the wrist.
Will the G-Shock GBA-900 fit your wrist?
With a 51.3 mm lug-to-lug, here is how it wears across common wrist sizes. We estimate the flat top of each wrist from its circumference; measure yours for a closer answer in the fit finder.
| Wrist | Flat width (est.) | Fit |
|---|---|---|
| 6" | 47.2 mm | Lugs overhang |
| 6.5" | 51.2 mm | Lugs overhang |
| 7" | 55.1 mm | Snug, lugs near the edge |
| 7.5" | 59.1 mm | Ideal fit |
| 8" | 63 mm | Ideal fit |
Specifications
- Reference
- GBA-900-1A
- Collection
- G-Shock
- Status
- In production
- Introduced
- 2021
- Case material
- resin
- Crystal
- mineral
- Water resistance
- 200 m
- Bezel
- fixed resin
- Dial
- black
- Strap / bracelet
- resin strap
- Weight
- 61 g
- Style
- Digital, Sport
Movement
- Caliber
- Casio 5641
- Type
- quartz
More G-Shock references
- CasioG-Shock DW-5600EDW-5600E-1V
- Case
- 42.8 mm
- Lug-to-lug
- 48.9 mm
- Thick
- 13.4 mm
- CasioG-Shock DW-6900DW-6900-1V
- Case
- 50 mm
- Lug-to-lug
- 53.2 mm
- Thick
- 18.7 mm
- CasioG-Shock DW-9052DW-9052-1V
- Case
- 43 mm
- Lug-to-lug
- 48.5 mm
- Thick
- 14.7 mm
- CasioG-Shock Full Metal GMW-B5000DGMW-B5000D-1
- Case
- 43.2 mm
- Lug-to-lug
- 49.3 mm
- Thick
- 13 mm
- CasioG-Shock GA-110GA-110-1B
- Case
- 51.2 mm
- Lug-to-lug
- 55 mm
- Thick
- 16.9 mm
- CasioG-Shock GA-2100GA-2100-1A1 · “CasiOak”
- Case
- 45.4 mm
- Lug-to-lug
- 48.5 mm
- Thick
- 11.8 mm
- CasioG-Shock GA-700GA-700-1B
- Case
- 53.4 mm
- Lug-to-lug
- 57.5 mm
- Thick
- 18.4 mm
- CasioG-Shock GA-B001 Carbon CoreGA-B001-1A
- Case
- 46 mm
- Lug-to-lug
- 42.5 mm
- Thick
- 13.8 mm
- CasioG-Shock GA-B2100GA-B2100-1A
- Case
- 45.4 mm
- Lug-to-lug
- 48.5 mm
- Thick
- 11.9 mm
- CasioG-Shock GBD-200GBD-200-1
- Case
- 45.9 mm
- Lug-to-lug
- 48.4 mm
- Thick
- 15 mm
- CasioG-Shock GW-5000UGW-5000U-1
- Case
- 42.8 mm
- Lug-to-lug
- 48.9 mm
- Thick
- 13.5 mm
- CasioG-Shock GW-M5610UGW-M5610U-1
- Case
- 43.2 mm
- Lug-to-lug
- 46.7 mm
- Thick
- 12.7 mm
- CasioG-Shock Mudman G-9000G-9000-1V · “Mudman”
- Case
- 46.3 mm
- Lug-to-lug
- 52 mm
- Thick
- 16.3 mm
- CasioG-Shock Mudmaster GWG-B1000GWG-B1000-1A
- Case
- 52.1 mm
- Lug-to-lug
- 58.7 mm
- Thick
- 16.2 mm
- CasioG-Shock Rangeman GW-9400GW-9400-1 · “Rangeman”
- Case
- 53.5 mm
- Lug-to-lug
- 55.2 mm
- Thick
- 18.2 mm
Watches that wear the same size
Other watches within 1.5 mm of its lug-to-lug.
- CertinaDS Action Diver 43mm Powermatic 80C032.607.11.051.00
- Case
- 43 mm
- Lug-to-lug
- 51.4 mm
- Thick
- 13.1 mm
- LonginesHydroConquest 41mmL3.781.4.56.6
- Case
- 41 mm
- Lug-to-lug
- 51.1 mm
- Thick
- 11.9 mm
- OrientOrient Star Sports DiverRE-AU0301B
- Case
- 43.6 mm
- Lug-to-lug
- 51.1 mm
- Thick
- 14 mm
- OmegaSeamaster Diver 300M 43.5 Black Ceramic210.92.44.20.01.003 · “Black Black”
- Case
- 43.5 mm
- Lug-to-lug
- 51.5 mm
- Thick
- 14.5 mm
- RolexRolex Deepsea136660
- Case
- 44 mm
- Lug-to-lug
- 51.5 mm
- Thick
- 17.7 mm
- BreitlingSuperocean Heritage B20 Automatic 42AB2010121B1S1
- Case
- 42 mm
- Lug-to-lug
- 51.6 mm
- Thick
- 14.3 mm