Small - 17 to 26cm 10mm
Medium - 24 to 37cm 15mm
Large -  35 to 50cm 20mm
X/Large - 40 to 65cm 25mm
XX/Large - 50 to 75cm 40mm (Only available in Black)
 
The Pet One Reflective Collar, Lead and Harness range is made from durable nylon and an eye catching reflective finish, to ensure your pet stands out from the crowd. Adjustable.