For the same hair length lace wigs and custom monofilament wigs, the wig length of wavy or curly hairstyles is shorter than straight hairstyle wigs. The curly or kinky perm hair tightens up and will fall higher. But when pulling the curl straight, the strand will be the same length as straight hairstyle wigs. For example, if you order a 18-inch long wig, if the wig is permed in a curly style, it may only measure out to be 15 inches long if it is measured curly. But when pulling the curl straight, the strand will be 18 inches.