Please allow for a 1-2cm difference due to measurement deviations.
Size S

PTP: 33cm
UB: 60cm
Length: 32cm

UK 6-8 US 4-6
Size M

PTP: 36cm
UB: 64cm
Length: 34cm

UK 8-10 US 6-8
Size L

PTP: 37cm
UB: 68cm
Length: 36cm

UK 10-12 US 8-10
Size XL

PTP: 41cm
UB: 78cm
Length: 34cm

UK 12-14 US 10-12