Nice mare. Definitely has a good, deep girth.
Shoulder angle is steep, which sets her neck high and makes it look long.
Beautiful hindquarters and nice legs. Back pasterns look a pit "puffy" but that could just be the picture & shadowing..
Her condition is pretty much ideal. See the faint shadowing of rib? That's how I like my horses. Just the faintest hint of a couple of ribs, and good muscle covering, especially on the hindquarters.
She isn't a jumper, IMO. Downhill build, and I'm not a fan of her hindquarter. That's not to say she can't perform well though - Hickstead was conformationally rubbish for jumping and look what he could do! I'm just saying I wouldn't buy her to jump. We don't have hunter jumper here, but form is important in SJ for functional reasons.