Try the suit, not the panties.
I bought the tummy shaper thong. My advice to anyone would be to buy the bodysuit. Depending on what your wearing, the underwear will smooth you down but leave a spillage from the preassure where ever it ends. In my case, the “spill” is at the top by my bra line and a bit is noticeable on the thighs as well. If you were wearing a pencil skirt you would notice.