Size Chart

Find your perfect Hammer Head Swim Cap fit with our sizing guide and enjoy comfortable, secure head protection in every swim.

Pick your perfect fit

Medium — our most universal and most popular fit
Small — great for young swimmers
Large — ideal for adults with big heads or anyone with thick or long hair

We’re here to make sure your Hammer Head fits like a dream.

Woman wearing a black Hammer Head swimming cap with the size chart to find the perfect and comfortable fit with a swim pool in the background. Choose from small (for children swimmers), medium (for youth to adult swimmers) or large (for adults with bigger heads or long hair).