KONG Ultra Neoprene Padded Dog Collar by KO Pet Supplies KONG Ultra Neoprene Padded Dog Collar by KO Pet Supplies. Ultra neoprene padded for the utmost comfort of your dog. Extra wide for added comfort and better control. Size: Small 10-14" & 3/4" Wide. Medium 14"-20" & 1" Wide. Large 18"-26" & 1.5" Wide. Strong durable hardware and added ease of adjustability in this new design. Specially packaged by Knockout Pet Supplies, we cannot guarantee the authenticity of this item sold by any other sellers.