I have a beautiful black leather crystal ladened collar here tht I bought for $300.00...It is still brand new, and sadly was never worn...It was meant to be an adult collar. If you are interested I could get some photos done...The size is up to 34 / 35 inches (can't remember which).
Not that they are true type collars...But I love the collars that Dogma LOndon makes...Cloth, silk lined...They are custom made and can be done in any size... -link-
I can make you one. I need the measurements. These are true neapolitan type collars with accoutraments purchased in Naples and real badger hair. [ image disabled ]