Hi. We have two really nice Sporn no-pull harnesses, barely used. They're very soft and do a great job of keeping your dog from pulling. I think ours are either the medium or large size -- one was for our beagle/basset mix (about 40 lbs.), and the other was for our dalmatian-sized mutt (about 50 lbs.)
The pictures below are from the sporn website. The ones we have are in perfect condition. We're selling them for twenty bucks each, but if you buy both together, we'll knock five bucks off the price. Thanks!