Evo Boot size 4W converted to Flex Boot (Regular)

Sizing across brands only works through the millimetre band, never the number. Evo Boot and Flex Boot (Regular) both publish in millimetres, so a Evo Boot 4W (hoof length 143 to 148 mm) is matched by finding the Flex Boot (Regular) size that covers the same length.

Evo sizes step only a few millimetres apart and the width letters (W, WW) matter more than the number. Fit width by the letter first, then confirm the small length band, or you will land a full size out.

Flex fits within plus or minus 5 mm of the listed width and no longer than the listed length. A naturally round or upright hoof wants the Flex Wide, whose length and width match, rather than the Regular.