size M (36-38), UK: 4-5.5; US (male): 5-6.5; US (female): 6-7.5

size S (33-35), UK: 1.5-3; US (male): 2.5-4; US (female): 3.5-5

size XS (30-32), UK: 0-0.5; US (male): 1-1.5; US (female): 2-2.5

size XXL (45-47), UK: 11-12.5; US (male): 12-13.5; US (female): 13-14.5