I am looking into purchasing an english bridle for one of my geldings, but I am not sure what size to purchase. My gelding is a 15.3hh, 1200lb horse. He wears size Large and warmblood sized halters (the warmblood one is a bit loose). I measured the length from one bit ring, over his head, down to the opposite bit ring, and came up with a measurement of about 43 inches. He needs a longer throatlatch and browband than most horses, so I'm not sure how that will affect what size he needs. I'm pretty sure he isn't a cob size, but I am uncertain if he needs a full size or oversize bridle.
I am planning on taking these measurements to my local tack store, but thought someone here might be able to help me too.