Our Stock Size is Medium which is 22.5 inches, and we have the combs and elastic band or adjustable straps inside. We have received your request, and you would like to use the small/large cap for your wig, is that right? Kindly Reminder: For full lace wig and front lace wig: 1.The size of our full lace wigs and front lace wigs could not be changed. For closure wig/Bob wig/customized wig: 1. Small Size is 21.5 inches, Large Size is 23.5 inches, you should know your own size and make a suitable decision. 2. If you change to those special sizes, you may need to wait another extra 5-10 days. Would you like to wait? 3. It will be charged extra 10$ for making the special size for you. For U-part wig: 1 The cap size of U-part wigs could not be changed, but wig’s top is empty so you can adjust the wig according to your head size. Could you accept the above tips for your order ? If you want to ask for the small/big cap, please remember to take a note on the cart or send emails to us.