The Union Hill dressage pad is an excellent fit for Izzy's large, but shorter backed frame. It has a moderate spine length at 23", Speedy sized actually, with a generous 22 1/2" drop. And like any good dressage pad, it is nicely contoured along the spine with a small amount of extra padding at the withers.
The pad retails for $20.95, but if you're a regular SmartPak shopper, you can easily get it for less with a Smart Perks, USEF, or similar discount. If my girth ends up fitting too closely to the edge of the pad, it can easily become a schooling pad, and I can never have too many of those!
Overall, for around 20 bucks, the Union Hill Dressage Pad is a pretty smart purchase - inexpensive, but more than serviceable. I think I am going to break it in today.