The number of size is the number on the showcase.<br />Just select the number from size.<br /><br />size 1=Aries，   size 2=Taurus，   size 3=Gemini，   <br />size 4=Cancer，size 5=Leo，   size 6=Virgo，   <br />size 7=Libra，   size 8=Scorpio，size 9=Sagittarius，  <br />size 10=Capricorn，  size 11=Aquarius，  <br />size 12=Pisces<br /><br />Material:Cotton<br />Size:Adjustable size<br />Head circumference:56cm-63cm <br /><br />Warm Tips:<br />Due to the light and screen difference，the photo color might be a little different from the actual product due to color display of different monitors. Please understand. Make sure you don't mind before you bid.The size is measured by hands，please allow 1 cm error of measurement.