Easyboot Trail (and Trail Original / Old Mac's G2) size 4 converted to Cavallo Trek

Sizing across brands only works through the millimetre band, never the number. Easyboot Trail (and Trail Original / Old Mac's G2) and Cavallo Trek both publish in millimetres, so a Easyboot Trail (and Trail Original / Old Mac's G2) 4 (hoof length 125 to 130 mm) is matched by finding the Cavallo Trek size that covers the same length.

The Trail's length and width bands step in 5 mm increments and overlap heavily, so several sizes can look right. Fit to width first on this rounder boot.

Cavallo sizes on length, then you pick sole width. If your width is 6 mm or more under your length, choose the Slim sole in that size; otherwise the Regular sole.