Pet Type Size Neck Size
Cat One Size Fits Most 8-12" (20-30.5 cm)
Dog Extra Small (XS) 8-12" (20-30.5 cm)
Dog Small (S) 10-15" (25.5-38 cm)
Dog Medium (M) 13-20" (33-51 cm)
Dog: Large (L) 16-26" (41-66 cm)