Here is a Peck & Peck unstructured hat made of silk. It is from the 1960's or 70's and has a great mod print made up of bright colors. Under the fabric in the back there is a 5" elastic piece that is 1/2" wide. There is a seam around the crown tapering down to the back. The inner circumference is 26". When I put it on it is not tight but is slightly loose which is how I think it is supposed to be. Excellent condition.