if you couldnt see them well enough here are a few more pics….LOL.....
the one big is to show the 3 sizes, the red ones are puppy safety chokes. the med ones are the standard ones for basenjis, and the large are used with whippets or in Caesar's case a nice long neck. LOL
The green one is super old and beta was a chewer. She actually ate one of these collars completely(including tags) and passed it in pieces! That was right after I bought it and her first collar experience....
the solution with chewers is to keep it tighter. the med yellow one was hers and she never chewed on that one.