Quick answer: Place clear tape across each nail, mark the widest points, stick the tape on a ruler and read the width in millimeters. Match thumb to pinky against the size chart; if you're between sizes, choose the larger size and file the sides.
What you need
Clear tape, a pen and a millimeter ruler — that's it.
Reading the chart
Each set lists widths for thumb, index, middle, ring and pinky. Our milky white short square set uses the same XS–L chart as every set we sell.
Between sizes
Size up and file the sides; a nail that's too narrow lifts at the edges.
Frequently asked questions
What size are most people?
Size S and M fit most adults, but measuring is the only sure way.
Do sizes differ by shape?
Our XS–L widths are the same across almond, square and stiletto sets.
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