Sizing

The P1 and Enthusiast gloves both have stretchy backs that provide flexibility with sizing.

Measure around your hand just below the knuckles, excluding the thumb.

Palm circumference:

S - 18-20.5 cm (7.1-8.1 in)
M - 20.5-22 cm (8.1-8.7 in)
L - 22-23.5 cm (8.7-9.3 in)
XL - 23.5-26 cm (9.3-10.2 in)

The materials stretch, so the ranges overlap in real use. If you measure on a boundary, either adjacent size can work.