Cavallo Trek size 0 converted to Scoot Boot Classic (Regular)

Sizing across brands only works through the millimetre band, never the number. Cavallo Trek and Scoot Boot Classic (Regular) both publish in millimetres, so a Cavallo Trek 0 (hoof length 102 to 109 mm) is matched by finding the Scoot Boot Classic (Regular) size that covers the same length.

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.

Scoot's own rule: if the hoof is 10 mm or more wider than it is long, size on the maximum width band, not the length. A round hoof can also take a Slim as a half size.