I'm asking because my colt is about 2 years old and has a nylon halter with a leather breakaway crownpiece. It seems to me like the nylon may be sort of chafing a bit, so I'd like to get him a leather halter. Only thing is, leather halters are generally more pricey and I don't want to get him one if he's just going to outgrow it in a year.
Right now he wears a yearling/large pony size halter. I'd estimate he's about 14.1 hh. Is he likely to grow much more than an adjustable halter can accommodate?