Using this cap is super easy. Just place it on your head and adjust it to fit your comfort. Since it has a circumference range of 22 - 24.4 inches, it should fit most head sizes. When it comes to maintenance, you can hand - wash it in cold water with mild detergent. Avoid using bleach as it might damage the cotton material. After washing, let it air - dry. Be gentle when handling the tied bow to keep its shape. And always store it in a cool, dry place when not in use.