I have a big head and thick hair so when this came in I tried it on with my hair down and it was way too tight.  Had to order a hat stretcher.  Because of the construction, it is well made for an occasional hat, it didn't stretch as much as I would have liked. But, it got the job done for our costume party and it stayed on the whole night and was a nice compliment to my outfit.  Would buy again IF there were more ways to identify size or have alternate sizes for sale.