Yep, got a Belgian mare that is a little over 17 hands and she had been bred to a barely 14 hand QH. Now the baby is a yearling and standing at 15 hands. Sometimes you will get a structural crop-out even from same-size matings. At an Appy show farm my Dad used to work at, there was an appy mare and stud that both stood a little over 14 hands. They were bred several times and each of those times, the foals matured to a little over 14 hands. They were bred again and the resulting foal was a mutant. He matured to a little over 16 hands LOL. So breeding is always a complete toss up as for what you will get.