1/10th Scale = 7 inch figures (McFarlane, NECA, etc.)
1/12th Scale = 6 inch figures (Marvel Legends, Mezco, Hasbro, etc.)
1/18th Scale = 3.75 - 4 inch figures
NOTE!! - If you are using a Figma, SHFiguarts, DamToys or other 5 1/2 inch figure, please select the 1/12 option and attach a buyers note that you are using one of these bodies.