We have this harness in the small pony size. It would fit an 11-12 hand pony. We bought ours for an arab/welsh pony and never used it. But it is a beautiful harness. The leather is very nice, the saddle is well padded and treed. The bridle is beautiful. It's just a VERY nice harness. Unfortunately our harness doesn't fit the minis. The last I "talked" with him, he didn't have this very same harness in the miniature size, but I see that it is now offered in the mini "B" size. I would email and ask if the mini "B" is exactly like the harness pictured. He is easy to work with and has been wonderful with us!