US: S to United Kingdom Size 6.5
Cross-market women’s glove conversion mapping S specifications into 6.5.

Analyzing Glove Size Equivalence Across Markets
US: S: Features a palm circumference of 18 (7 ), finger length of 7 (2.8 ), hand width of 7.5 (3 ), and hand length of 17 (6.7 ).
United Kingdom Size 6.5: Features a palm circumference of 16.5 (6.5 ), finger length of 6.5 (2.6 ), hand width of 7 (2.8 ), and hand length of 16 (6.3 ).