Reversible satin bonnet that can be worn on either side! Keeps hair from drying, frizzing, and breaking while also holding in moisture during sleep! There are multiple color variations to meet the needs of every personality! Medium (Adult): Essentially your average beauty supply store sized bonnet. Bonnet sits right on your head with little to no hanging. Perfect for shorter hair women who don’t really add extensions or length. (21’’ elastic circumference) Large: bonnet that sits about shoulder length. Perfect for women who want a bonnet that’s sized for all hair possibilities. (Natural fro, curly/fluffy hair, long extensions/braids, etc) (21’’ elastic circumference) Extra Large: Long curly/fluffy hair, long braids/extensions! I would only get this size if you plan to use it for these specific hair situations. Unless you just like the exaggerantly large bonnet look (which I personally think is cute on people 😍) (21’’ elastic circumference)