The heel of my cowboy boot is 1 5/8". I usually ride an Australian saddle with English stirrups in my Tony Lama cowboy boots...OK, I look really
confused, but my heel can't go thru, and the part of the boot without the heel is short enough that I can't see how it could hang up.
Never say never, tho, particularly with horses. Glad you weren't hurt. Now you know why I'm too big a wimp to try jumping...
Besides, no one would let me on the course looking like I do!