My plus size gals yes this fits a u.s. size big belly or after pregnancy pooch. i am still a bit swollen after having a tummy tuck so i decided to use this corset and it is flimsy , thin , and you will actually need actual corset strings for this unit if you are going to try waist training in it and yes i am going waist train in this unit ( problem?? )  anyways i purchased unit i believe in the largest size that was available and i am a us. size 16-18 - xl-2x or 3x  depending on fit and stretch of the material of the clothing. Corsets are very expensive so thats why i bought this unit because it was more affordable.i like the shine of the material and it is comfortable the boning is very light so eventually they will start bending. Just remember it is more for costumes then waist training but hey do what you have to do to make it all work .