Smart Collar Size Guide: Please measure your dog

Size A Neck B Length C Diameter Small 6 to 8 cm 9 cm 14 to 20 cm Medium 8 to 10 cm 11 cm 19 to 23 cm Large 10 to 12 cm 16 cm 25 to 30 cm X Large 12 to 16 cm 20 cm 34 to 40 cm XX Large 16 to 20 cm 28 cm 41 to 52 cm

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