Double Row Spike Collars Sizing Chart

 Size Neck Size Collar Width
12 8.5 to 10.5 inches 3/4 inch
14 9.5 to 12.5 inches 3/4 inch
16 11.5 to 14.5 inches 3/4 inch
18 12 to 16 inches 3/4 inch
20 14 to 18 inches 3/4 inch