3 Dirty Dawgz Adjustable Conversation Hearts Valentines Day Dog Collars for Medium Large and X-large Dogs These awesome dog collars are constructed in the USA 1" width dog collars Please be sure to measure your dog's neck for correct size for proper fit to avoid exchanges Available in 3 sizes: Medium 14"-22", Large 17"-27", X-large 20"-34" We use Polypro webbing instead of thick nylon for the heavy backing. It is JUST as strong as bulky nylon but much lighter on your dogs neck