Gym Sizes:

Tiny
= 50 m² and below

XXS
= 50 ... 100 m²

XS
= 100 ... 500 m²

S
= 500 ... 900 m²

M
= 900 ... 1100 m²

L
= 1100 ... 2000 m²

XL
= 2000 ... 5000 m²

XXL
= 5000 m² and more