I tend to agree about perhaps sizing up instead. The issue with shapewear under white pants is that any line on the thigh is likely to show, at least when you sit down. Even the non-binding types will show a delineation between them and the skin, and that is highlighted more with white pants, even with nude shapewear. So you would have to wear capri length shapewear or something below the knee, which I personally would find to be terrribly hot and uncomfortable - kind of ruining the point of white pants, IMO. I vote to keep searching for a pair that has the proper fit and fabric weight not to show any figure concerns instead of going for shapewear.