To determine sizing measure back from base of the neck down to the tail.
- XS 14.4"
- SM 16.5"
- ME 18.7"
- LA 21.5"
- XL 24.2"
- XXL 27"
- 3XL 29.7"
(Names and descriptions are in American Standard English, product names and descriptions may vary due to wording/dialect. e.g. British English, Irish)