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For the most accurate measurement: Wrap a soft ruler around your widest nail point (excluding sides) and note the measurement in millimeters.


If you don't have a ruler: Place a piece of paper flat over your widest nail point and mark both sides with a pen. Then, carefully remove the paper and measure the distance between the marks on a ruler in millimeters.


Model Thumb Index Finger Middle Finger Forth Finger Little Finger
XS 14mm 10mm 11mm 10mm 7mm
S 15mm 11mm 12mm 11mm 8mm
M 16mm 12mm 13mm 12mm 9mm
 L 17mm 13mm 14mm 13mm 10mm