Size Chart
Neck
Chest
Weight
XXS
5-7"
8-10"
1-2lbs
XS
7-10"
10-12"
2-5lbs
S
11-13"
13-16"
6-10lbs
M
12 1/2-15 1/2"
16-19"
11-15lbs
L
15 1/2-19"
19-21"
16-32lbs
XL
19-23"
21-26"
33-45lbs
XXL
23-26"
26-31"
45-70lbs
XXXL
26-31"
31-36"
71-100lbs