We bought this for our pup last year. We got a larger size he could grow into, but it didn’t really fit him until recently. It’s probably been about 5 months of using it and the collar keeps unbuckling!! Almost every time he sees a dog and he sudden pulls the buckle opens and sets him free! Luckily he’s friendly and has a decent recall but this is major safety issue, not only my dogs safety but as well as the people around him! I would not recommend this collar because it seems like it won’t last long and is super dangerous!