Was wondering if there are any brands which bridles are on the smaller side? My horse is in a cob grackle and all the buckles are on the top hole, but he is 16.2hh.

You could go to your closest tack store and ask them and see what they think, I’m n
My 17” collegiate jump saddle fits all my horses from 14.1hh-17hh, they aren’t too pricey either