Small:

Length 28 in

Pit to Pit: 19.5 in

Medium:

Length 29 in

Pit to Pit: 20.5 in

Large: 

Length 30 in

Pit to Pit 21 in

XL: Can Fit as Large

Length 30.5 in

Pit to Pit 22 in

XXL: Fits as XL

Length 31.5 in

Pit to Pit 23 in