This knit Santa Claus hat can be modified for use by an elf, or made from patterned or plain fine knit fabrics to make ski hats for any size or shape of doll. As shown here the hat has been made from four way stretch velvet, material which stretches in both directions, which makes it easy to put on and take off a doll. The hat requires only scraps of stretch velvet or another fine knit. I used the same type of velvet for the white trim and pom pom on my hat, but you can also use yarn, or the type of short rayon wigging used for dolls to trim the hat if you wish.
As shown here the Bhat is on a 1:24 scale Polly Pocket doll and a 1:12 scale BJD.