Hello, so if you choose a slightly larger one and a slightly smaller one, I still mind that you choose a smaller one, so it will be better to wear, and the better shape will not sag and feel good. What she said is right, provided that it is not much smaller. For the odifen you asked, the effect is ok, but the price is a bit high. I think some professional plastic underwear is more effective and cost-effective, although not much. Underwear is the most suitable for you, I hope it can help you.