CurlCap is one size for all, our scrunchie back-strap adjusts under the sweatband to offer a custom fit. Intentionally designing the velcro under the sweatband keeps your hair safe from snags. You simply pull the strap away from the velcro and slide it down to tighten. Firmly press them back together to smoothen. Wearing your haircare is easy, painless and versatile in a CurlCap!