I don't like this one, it's kinda ugly, but I like the idea. DIY Sweater (mini) skirt - can be as short or as long as you want, depending on the size of the sweater you use to start. Definitely want it snug though I think, so take in the sides if need be.
DIY: extra inches with lace. Refashion a too short basic tee with a lace hem. An apple never wants a t-shirt to end at our waist line! Re-fashion and elongate shirts to bring the eye line down (past that tricky zone). Use lace and other patterned fabric.