Review on 🐶 Optimized Electric Dog Fence and Bark Collar Strap with Durable Locking and Quick-Release Clip - Black Bones, Medium - Fits Necks up to 18" (also compatible with other fence collar brands) by Michelle Miller

I made the mistake of buying another replacement collar without checking if it was glued on both sides or just one side and where the holes were. This collar from the same brand had holes in a fixed position too close to the connector and only the other side was adjustable in size. This version is similar to the OEM PET SAFE collar in that it is adjustable on both sides and the hole position is always centered and directly opposite the connector. Easier to put on and I think more comfortable for the dog. (I never heard him complain.) Would have preferred a plain black collar, but the bones are a little weird for our 12 year old beagle.