Size: 1/3 doll head circumference about 8 to 9 inches (21 to 24 cm), 1/4 doll head circumference about 7 to 8 inches (17.5 to 18.5 cm), 1/6 doll head circumference about 6 to 7 inches (15 to 16.5 cm), Suitable for dolls such as SD, BJD, DD MSD, Obitz but please check your dolls head circumference. The back of the wig is elastic, so it can accommodate some stretch sizes.