Why do you ask?
I ask mainly because 9 out of 10 dogs that come into the grooming shop have collars WAY too large for them. Now, they may walk nicely with their owner, but they DON'T want to willingly come into the shop and they are constanly slipping out and getting away. It is frustrating and I think very dangerous for a dog to be able to get off its leash/collar.

And yes, that story reminded me that I wanted to make this poll.