Package Include: 2 waves caps, 4 waves caps and 6 waves caps Cap Size: 21Inch to 23Inch ( This wave cap is suitable for head size 21’’ to 23’’, if your head is too big or too small, your head size not in 21’’ to 23’’, please be wise to choose ) Kind Tips: Normal head size suitable for 21’’-23’’, This wave cap is suitable for head size 21’’ to 23’’, if your head is too big or too small, your head size not in 21’’ to 23’’, please be wise to choose Refund: Our mission is to make our products to satisfy every our customers and make sure each of you own the shining and healthy waves after using our products. If you have any question, without hesitate, please contact us immediately, we will refund you money or send you new one.