Size

Neck 

Recommended Width

Extra Extra Small

6.5 to 9.5″ (16.5cm to 24.1cm) 

3/8" & 1/2"

Extra Small + Cat

7″ to 9.5″ (17.8cm to 24cm)

3/8", 1/2" & 5/8"

Small

10″ to 14″ (25.5cm to 35.5cm)

5/8" & 3/4"

Small/Medium

11.5″ to 16″ ( 29.2cm to 40.5cm)

3/4" & 1"

Medium

13″ to 18″ (33cm to 45.5cm)

3/4" & 1"

Large

16″ to 23″ (40cm to 58cm)

1" & 1.5"

Extra Large

17.5″ to 27.5″ (44.5cm to 70cm)

1" & 1.5"

Size

Neck 

Chest 

Fabric Length

Standard Fabric Harnesses Sizing