Sizing (from end of buckle): 21 1/2 Inch (overall length) First hole- 17"
Last hole- 19 1/2"
23 1/2 Inch (overall length) First hole- 18 1/2"
Last hole- 21 1/4"
25 1/2 Inch (overall length) First hole- 20 3/4"
Last hole- 23 1/4" 27 3/4 Inch (overall length)
First hole- 22 1/2"
Last hole- 25 1/4"
Collar is made from two heavy strips of leather sewn together.
It measures a massive 1/4" thick