saddlesore
Well-Known Member
I always get muddled up with the metric/imperial converison. I recently bought a 12.5cm happy mouth for my horse which i thought was a 5", but the bit seems a bit neat. He normally takes a 5"! so was doing some googling and some say that 12.5cm is 4.75" and 13.5cm is 5 1/4"
I am selling the happy mouth now as too small and was looking at getting a nathe (straight bar) but have no idea what size to order as they are metric sizings also - please help!!

