This antique bonnet measures 15" around the edge, and measures 5-1/2" from side to center back, for an ear-to-ear measurement of 11". It is shown on a doll with an 11" HC measured over the wig, so this hat will probably fit a 14-15" HC. There is one weak spot, shown in the last photo. The hat is made from a wonderful soft semi-sheer cotton. There is a delicate gathered gauze trim around the edge of the bonnet, wonderful insertion lace, and a medallion at the center back topped off with a silk bow. There is a casing in which there is soft cotton twill ribbon, to tighten the edge of the bonnet. I have not attempted to tighten or loosen the ribbon. There is some yellow discoloration on the bonnet, which might wash out with a gentle hand washing. This wonderful item dates from the latter half of the 19th century. Shipping insurance is included with domestic Priority Shipping. International buyers, please check with me to find out if I ship to your country.