Shapes of Sizing Kit:
Almond- Covers Almond, Stiletto, Coffin, Ballerina, Medium Almond, Arrow Head, Long Almond, Long Stiletto, Long Coffin, Long Ballerina.
Oval- Covers Oval and Long Oval. (This shape tends to run more narrow.)
Long Square- Covers Long Square. (This shape tends to run the widest.)
Short Square- Covers Short Square. (This is the shortest of all shapes.)
Once you have measured all your nails you will know if you are a pre-sized option of XS-L or custom. Please keep in mind it is very common for sizes to be custom and be sure to measure both hands.