I have some black leggings which I wear under knee length knitted tunics or knee length shirt style dresses. My bum is NOT on show nor is my tum. I`m tall (5ft 10) and even though I am not a model size 10 or 12, I`m actually size 18 at the top, size 16 at the bottom, my legs are quite slim and the leggings are only visible from the knee downwards. If I`m wearing them with a knitted tunic I tend to wear ankle boots, if I`m wearing the leggings with a shirt dress then I tend to wear ballet flats. There is no way I`d ever be seen dead wearing leggings with just a T shirt or a short top or jumper and believe me I`ve seen plenty plus size ladies doing exactly that and not a single one of them looked good. Very young, very slim women can get away with it but everybody else just looks ridiculous.