
The inside circumference of the hat is approximately 21 inches before stretching. My large skull + thick hair is about 23.5 inches tall. Although the hat can be stretched to accommodate the volume of the hair, this is uncomfortable for me. I can't stand it even for a short time, let alone overnight. The hat is beautiful so I am giving it to a dear friend with very thin hair and a small head. She jokes that her head is so small that she has to stuff newspaper into a bike helmet. It will be perfect for you.

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