Yes, this saddle has a rounded skirt. It measures 30" long and does have a slight curve in the back. Most Arabian saddles are 24" or 26.5" long, but I thought that with the rounded skirt it might work.
I don't know if it extends beyond the last rib, but I will check tomorrow. Thank you for that.
It is the most beautiful hand-tooled custom saddle and seems to fit fine everywhere else.