Teen Forum Moderator
Join Date: Dec 2010
Location: South East Texas
My miniature horse's head is 30" around from mouthpiece to mouthpiece, which means she wears a size B miniature horse bridle, if that helps you at all. Those generally get to be about 32" and that's it. If he's that size or bigger (most likely already is) I'd say a medium sized pony bridle would be fine. 32-40" should be adjustable enough for him for a while.
As for a bit, I'd go for an unjointed mullen mouth or a single jointed snaffle, preferably a half-cheek if you're going to ground drive him. That's what I ground drive our youngsters and minis in and it works well. Just make sure that it fits him. My guess it that he'd wear a 4" pony bit. My mini wears a 3.5".
You may have to play around with the bit some. Some horses just don't like the feel of an unjointed bit, or might want something 'fuller' like a rubber bit. Now is a good time to determine what he likes and doesn't like. I'd also make sure that you bridle doesn't have any fancy contraptions on it while you're first teaching him. A browband and throat latch will be just fine.
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