I just took a look at the cover and I think it would fit best on a collar that is 1 inch wide or less...You could probably fit it onto a collar that is 1 1/2 inch but this might be stretching it..I can take it off of the packaging and measure it if that would help it's attached to the packaging so I can't really open it up all the way. -RT
It's a collar cover :) It should fit. If the collar is 1 inch wide or less it should definitely fit. see above comments for more info. Thanks for looking! :)