Adriana
All Wig Caps Have Stretch and Internal Adjustable Straps Cap Size Circumference Forehead to Nape Ear to Ear Over Top X-Small 19.5 - 20.5'' 12.5 - 13'' 11 - 11.5'' Small 20.5 - 21.5'' 13 - 13.5'' 11.5 - 12'' Medium 21.5 - 22.5'' 13.5 - 14'' 12 - 12.5'' Large 22 - 23.5'' 14'' - 14.5'' 12.5 - 13''