Description of the size of the wig: 6-7Inch The head circumference is about 15.5-17.5cm. A head circumference of 16-17cm is more suitable. 15.5-16cm head circumference is too large, it is recommended to prepare silicone headgear. The head circumference of 17-17.5cm is tight and may not be worn. Please purchase carefully. 7-8Inch About 17.5-20cm head circumference. 18-19cm head circumference is more suitable. The head circumference of 17.5-18cm is too large. It is recommended to prepare a silicone headgear. The 19-20cm head circumference is tight and may not be worn. Please purchase carefully. 8-9Inch About 21-24cm head circumference. 22-23cm head circumference is more suitable. Wearing a 21-21.5cm head circumference is too large, it is recommended to prepare a silicone headgear. The head circumference of 23.5-24cm is tight and may not be worn. Please purchase carefully. In addition, some with a 20.5cm head circumference can also be worn with two layers of silicone headgear (maybe a silicone headgear with a high forehead) Include : Wig Only, not include the doll and other accessories! Please measure the head circumference before buying a wig, which is usually a little smaller than the official mark Hair process is complex, new products will inevitably have some floating hair, flying hair. Take it and shake it clean, spray it with care liquid and comb it neatly. Light-colored wigs may leak out of the net, which is affected by the hair color itself, not by the amount of hair. Due to the difference of the display screen, there may be a slight chromatic aberration, the color shall prevail. If the bangs on both sides are warped due to packaging, please use the steam pressure to restore the shape. For other baby brands, please check the head size parameters stated above. Any head size smaller or close to this hair size can be worn. For a baby with a small head circumference, please wear a headgear or head sticker~ If you don’t know whether the size suit for your doll,please contact us to check for it. Thank you! ******************************* You can buy wigs at this link (it can protecting head from wig color stain and fixing the wig on the head.) https://www.etsy.com/listing/859565044/bjd-silicone-headcap-for-112-18-16-14-13?ref=shop_home_active_1&frs=1