These officially-licensed Harry Potter corsets look amazing, and they’re available in plenty of sizes and for all existing houses.
Although they have lacing in the back (and a privacy panel – thank you very much whoever designed these), they also have a zipper on the side. A zipper on a corset? Well, yes. It’s not a srs corset, people. You’re not going to do waist training in this. It has plastic boning. But the zipper on the side means we can get in this without requiring another human’s intervention or, you know, magic.