These padded panties are great. The fit is just like normal undies, and they are made to last. Ive been wearing and washing them weekly for 2 months now and they still look and feel like new. The padding is just enough to add a little shape to my rear, but not enough that it is really noticeable. Just a gentle improvement in the shape. It also cushions me when I sit on hard surfaces, helps fill out pants that are a bit baggy in the back, and even feels normal if someone were to pat you behind.  I am 5'4" and 115lbs and usually wear a size 5/6 in undies and the small fit me perfectly.
I took a chance buying this, I was afraid it would look stupid, and leave people wondering what was happening to my rear, as they watch it grow and shrink during use and nonuse days. Not the case; like I said it just fills things out a bit in a natural way that people will just put down to the different cuts of the outfits I wear daily, if they notice at all.