If you were curious how big the GBX-100 display is, here it is next to a GPR-B1000 Rangeman. : r/gshock
Casio Gpr 100 Store, 51% OFF | ilikepinga.com
Casio G-Shock Rangeman GPR-B1000 Safari Green Japan | eBay
G-Shock GBD100-1 - Black / Red | Rogue USA
3 Pcs Screen Protector For Casio GPR B1000 GBD H1000 GD 100 GA 110 GA 700 GA 800 GA 735 GAS 100 Clear TPU Nano Explosion proof|Screen Protectors| - AliExpress