OUR 4x4 CLOSURE UNITS ARE MADE WITH 100% VIRGIN HAIR. EACH UNIT IS CONSIST OF 3 BUNDLES AND A CLOSURE. THESE UNIT CLOSURES ARE BLEACHED, CUSTOMIZED AND READY TO WEAR. OUR 4x4 UNIT CAN BE BLEACHED AND DYE.Wigs are standard size one size fits most. IF MY DOLLS HAVE A SMALLER HEAD, WE DO CARRY 21.75 WIG CAPS.