Good 2 Go training collar

Good 2 Go training collar, gauge 2.3mm, took links out to measure my pup but it’s not going to fit her and I have no idea where I put the receipt to take it back 🤨, nickel-chrome plated, for 🐶 weighing up to 18lbs, chain gauge is .09 IN (2.3mm), never worn (except for sizing), so brand new but no tags (except on the extra prongs, those are still packaged)