THIS HAT IS SMALLER THAN MY USUAL HATS. It measures 21” around. PLEASE DO NOT BUY IF YOU HAVE AN AVERAGE SIZED HEAD!!! SHIPPING COSTS HAVE GONE UP!!!! This is made from a licensed fabric but not a finished product from a company. It’s single thickness. The fabric has been prewashed before making the hat. So the hat shouldn’t shrink. It is a single layer. I do not make custom sized hats. One size should fit most. They measure about 23-24 inches around and about 4 inches tall. If you have any questions, please let me know. Most of my hats are made from rare/hard to find fabrics at a great price. Images on fabric may be in different locations throughout the hat.