Some G-Shocks (like the Mudmaster) are massive. Check the case diameter. If you have smaller wrists, look for "S-Series" or the GMA-S2100 models.
Major retailers like Amazon (ensure it says "Sold by Amazon") or specialized stores like G-Store . buy g shock
G-SHOCK Official Website. | CASIO. Store. Collections. G-Shock Universe. Iconic Styles. G-SHOCK official website Some G-Shocks (like the Mudmaster) are massive