I finished binding the 1880s corset last night, so I immediately had to try it on. I'm happy with the fit, though I did leave a large gap in the back. I'll wait and see if the corset stretches with wear, but I may add a modesty panel.
The fabric is just two layers of black cotton twill. I didn't put a lot of bones in (there are ten spiral steels, plus two flat steels in the center back), but I think that's fine because there is only one space that is over a couple inches wide between any two bones.