Neck Measurement
Q-Collar Size
Centimeters
Inches
27 1/2 - 30
10 3/4 - 11 3/4
11
30 1/4 - 32 1/2
12 - 12 3/4
12
32 3/4 - 35
13 - 13 3/4
13
35 1/4 - 37 1/2
14 - 14 3/4
14
37 3/4 - 40
15 - 15 3/4
15
40 1/4 - 42 1/2
16 - 16 3/4
16
42 3/4 - 45
17 - 17 3/4
17
45 1/4 - 47 1/2
18 - 18 3/4
18