I ordered S-M black to go under my rockabilly dresses. I'm 34B, 130 lbs, 5'2'', and I mostly wear medium bottoms.
This skirt isn't as full as more expensive, dance quality petticoats. I wore this under my homecoming dress. It stayed up extremely well, even when jumping up and down repeatedly. I also took this petticoat on a plane and it can be compacted fairly easily. Keep the bag for storage if you don't want to take up half your closet. The skirt underneath makes it not scratch although it probably wouldn't scratch you even without the skirt.
When you first take the petticoat out of the package, it doesn't have much fluff. To make it fluffier you must pull apart the layers of netting.
The petticoat is good for parties because the radius of it isn't overwhelming but it's still very noticeable.