For brands like Sven, Naot, Finn Comfort, Sanita,
Spring Step, Woplky, MBT, Arcopedico, Arche, Spira,
Taryn Rose, Cozy Goose, Mephisto, Ecco and Beautifeel,
use European sizing. For brands like Stegmen,
Simple, UGG, Emu, and Ulu, use American sizing.
Acorn has a seperate grid because their size range
contains XXS and XL.