Guides
Straight answers before you commit — models, materials, fit and care.
- 6 min read
G-SHOCK Model Guide: GA-2100 vs GM-2100 vs GW-6900 vs DW-5600 vs GMW-B5000
Compare the most popular G-SHOCK base models for custom watches — shape, display, weight and style — and find the right one for your wrist and rotation.
- 4 min read
What Is a CasiOak? The GA-2100 Explained
Why the octagonal G-SHOCK GA-2100 is called the CasiOak, how it differs from the GM-2100, and how to choose a custom colorway.
- 5 min read
Moissanite G-SHOCK Bezels: Stones, Fit and Care
Everything to know before buying an iced-out G-SHOCK bezel: what VVS moissanite is, model compatibility, installation and care.
- 3 min read
How to Measure Your Wrist for a Watch (in 60 Seconds)
Measure your wrist with a tape or a strip of paper, then use our chart to see how GA-2100, GW-6900, GA-700 and Baby-G cases will wear.
- 4 min read
Custom G-SHOCK Watches Explained: What “Custom” Means
What a custom G-SHOCK is, how Bezelwright styles differ from stock models, what is and isn't made by Casio, and what to check before you buy.
- 4 min read
Can You Swim With a G-SHOCK? Water Resistance Explained
What 200 m / 20 bar water resistance means on a G-SHOCK, whether you can swim, shower or scuba dive with one, and what changes on a custom watch.
- 4 min read
G-SHOCK Battery Life by Model (With Module Numbers)
How long each G-SHOCK battery lasts, by model and module: GA-2100, GM-2100, GA-700, DW-5600, GA-V01, G-7900 and the solar GA-B2100, GW-6900, GW-M5610 and GMW-B5000.
- 3 min read
G-SHOCK Size Chart: Case Size, Thickness and Weight by Model
Every G-SHOCK we build on by case size (mm and inches), thickness and weight, from the 11.8 mm GA-2100 to the 19.6 mm GA-V01, plus which models suit small wrists.
- 3 min read
Tough Solar Explained: How Solar G-SHOCKs Charge and How Long They Last
How Casio's Tough Solar works, how much light a solar G-SHOCK needs, how long a full charge lasts on the GA-B2100, GW-6900, GW-M5610 and GMW-B5000, and how to charge one.
- 3 min read
Multi-Band 6 Explained: How Atomic G-SHOCKs Set Themselves in the U.S.
How Multi-Band 6 G-SHOCKs receive the WWVB time signal from Fort Collins, Colorado, how far the signal reaches, how to get a good sync, and how it differs from Bluetooth.
- 4 min read
How to Spot a Fake G-SHOCK (and Where to Buy a Real One in the U.S.)
Check the module number on the case back, test the functions against Casio's manual, inspect print and buttons, and confirm the seller in Casio's store locator. Plus: what a custom G-SHOCK is.
- 3 min read
Do Custom G-SHOCKs Have a Warranty? Casio Coverage vs Customizer Coverage
What Casio's U.S. limited warranty covers, why modifications change the picture, and what Bezelwright covers on a custom G-SHOCK: the 14-day return policy, damage on arrival and how to get help.
- 2 min read
Shipping, Sales Tax and Duties on U.S. Orders
Free standard U.S. shipping with no minimum, same-day dispatch from Los Angeles before the 6 PM Pacific cutoff, delivery times, and why U.S. customers pay no import duties.