I recently indulged myself and got me a pair of silicone hip pads. They are rather heavy and are self-adhering, as long as they are cleaned after each use and there is no moisture between the pads and the skin. They add about one inch on either side. With tight fitting clothing, like leggings, tight jeans or pencil skirts they can be worn as is, with more relaxed clothing I'd recommend wearing some shape wear or nylons over them, just to make sure to keep them in place, especially when some moisture starts to build up.
Putting them on for the first time was eye-opening. I hate my rather boxy frame with broad shoulders and narrow hips and everything about it screams 'man'. But when I wore them for the first time, I really saw a woman's shape in the mirror for the first time and that was instant gender euphoria.
Here is how they look:
Some downsides are that they show a little when wearing shorts or mini skirts, and they are uncomfortable in the restroom since they might fall off when sitting down after pulling down all clothing items that help hold them in place (when sitting they are bent a little which tends to pull them away from the skin on the front side of the thighs).
In conclusion, I love them, but they are not an everyday item, as much as I would like to have exactly that padding permanently attached en nature...
Hugs,
Heidemarie