It's a fact that men are built differently than women. If you are not of the petite sort (which some sissies are lucky to have been born that way), you may have trouble finding women's lingerie that fits comfortably.
If you are overweight and if you are working on becoming more feminine, you may want to try some sissification mp3 recordings that have a subliminal effect on you.
Nowadays it's easy to shop online for anything the sissy crossdresser needs to complete her wardrobe. Work on that figure, practice your femininity, no matter what your size. See How to Lose Weight AND How to Get an Hourglass Figure on FemmeSecrets