Our improved Calmer™ collar is the preferred, extended-use collar and the most popular collar among veterinarians. Incorporates an EasyFeed™ opening to allow animals to eat and drink without removing the collar. Additionally, the inner lining has an easy-to-clean surface; making the Calmer a long-lasting product for pets. Details • Full body coverage • EasyFeed™ opening allows animals to eat and drink with ease • Easy-to-clean surface • Multiple Velcro® strips for adjustable sizing • Hand wash and line dry SIZE NECK CIRC. DEPTH Xsmall 15 cm - 23 cm 12cm Small 23 cm - 28 cm 14cm Medium 30.5 cm - 41 cm 20cm