1/12th Scale = 6 inch figures (Marvel Legends, Mezco, Hasbro, etc.)
1/18th Scale = 3.75 - 4 inch figures
Figures Used --
1/12 - Hasbro - GI Joe Classified Series - Snake Eyes
1/18 - Boss Fight - H.A.C.K.S. Blank Body
-- Special comment for 1/18 scale -- Many manufacturers make the accompanying accessories a little bit oversized for the sake of durability. This typically causes the figures hands to stretch out making anything smaller difficult to grasp. If you are having this issue, run the hand under warm water to soften the plastic and gently massage it back into a more neutral position.