I'm not really that evil a Santa.
I gave them unfelted to DH, my Dad and Dad's DSO on Christmas morning. My Dad's were blue and grey, and he was wearing one of them like a Smurf hat that morning. When everyone came for Christmas dinner I did a massive clog felt, and everyone got a custom fit that way. It was fun and there was also the WOW
factor between the unfelted and felted sizes.
If I have to mail felted items I do the felting and make an educated guess on the size, but that one Christmas morning was priceless.!