I just bought two haflinger mares, from an amish guy that does my breaking of minis. MIne are smaller, 13.2 hands, but heavy boned, and I bought them a standard horse harness and had the bridle altered a bit. Other than that it fit well with the adjustments. Mine are absolutely bomb proof. traffic safe, and child safe. You cannot fault them, and have never been more pleased than with them. I actually get them both out, and when my niece (11) is learning to ride, the other follows along behind, with absolutely nothing on. I learned this was easier than watching her run the fence. I am now looking for a stallion to breed them to.
We put them in the christmas parade, and everyone was tickled with them. I put them pulling an antique governess type cart, with two minis ( both chestnut with white mane and tails behind ( just walking behind the cart, and we were the hit of the parade. My niece actually won the 100.00 prize for her entry.)