Does anyone know the mm size of the Happy Mouth dee ring? I am using a Herm Sprenger Duo and at 16mm it's a bit too thick for my horse's small mouth. I'm wondering if a Happy Mouth could work but I can't seem to find a measurement anywhere... TIA!
I'm guessing it will be thicker than the duo since I have a Happy Mouth loose ring and it's pretty thick. I thought I'd look beyond the mullens as the duo seems to be the thinest flexible mullen around... Ah the joys of bit shopping.