Size and shape measurements (text version)
Measure each nail at its widest part. Between sizes? Choose the larger size and gently file the sides.
Size chart, thumb / index / middle / ring / pinky (mm): XS 14 / 10 / 11 / 10 / 8; S 15 / 11 / 12 / 11 / 9; M 16 / 12 / 13 / 12 / 10; L 17 / 13 / 14 / 13 / 11.
Square, Oval, Almond, Coffin: Short 18 mm (0.71"), Medium 24 mm (0.94"), Long 30 mm (1.18"). Stiletto: no Short; Medium 24 mm (0.94"), Long 32 mm (1.26").
For custom sizing, measure all ten nails on both hands, thumb to pinky.