Nail bed width at its widest point, in mm.
Size Thumb Index Middle Ring Pinky
XS 14 10 11 10 8
S 15 11 12 11 9
M 16 12 13 12 10
L 17 13 14 13 11
Fit tips
Pick the size that fits most of your fingers. Almost nobody matches one size on all ten.
Between two sizes or flatter nail beds? Size up. A slightly wide tip sits flush, a narrow one lifts.
Short almond tips run a little small, so size up for those.
Shape and length
Tip length past the nail base, in mm.
Shape Short Medium Long XL
Square 14 to 17 19 to 22 24 to 27 30+
Oval 15 to 18 20 to 23 25 to 28 32+
Almond 16 to 19 21 to 24 26 to 29 33+
Coffin 17 to 20 22 to 25 28 to 32 35 to 45
Stiletto 18 to 21 23 to 27 30 to 35 40 to 45
Measure every finger. Your two hands are rarely the same.
Measuring tape
Paper strip
Lay the tape flat across the widest part of your nail bed, following its curve.
Note the mm mark. Repeat for all ten nails.
Lay a strip of paper or tape across the widest part of your nail.
Mark a dot at each edge of the nail bed.
Peel it off and lay it flat on a ruler.
The gap between the dots is your width.
Measure your natural nails, not over acrylic or gel.
I have my numbers