I think it would be too large for a teacup. My aunt had a couple of teacups and I know they're tiny! You would probably want an extra small collar for a dog so tiny. Sorry and good luck!
aww sorry to hear! My little dog went missing a few months back, this was one of his collars. I miss him and hate to get rid of his things but I figure someone else would get good use out of it
Well, I know that they sell very nice leather spiked collars at Petsmart but the prices can be a bit steep. I know a collar like this one for my large dog (100lb Rottweiler/Alaskan Malamute mix in my photo) would be around $30 :(