Many Tosibox products and accessories use SIM cards.  Please use this reference to determine the correct SIM for your device:


Credit: Justin Ormont via Wikimedia Link


Tosibox Lock 500i Series - Micro SIM (3FF)


Tosibox Modem TB4GM2 - Mini SIM (2FF)


MultiTech MTC Series - Mini SIM (2FF)


MultiTech MTR Series (MTR-@@@7) - Micro SIM (3FF)

MultiTech MTR Series (MTR-@@@1, MTR-@@@2) - Mini SIM (2FF) 


Huawei MS Series - Mini SIM (2FF)