Peplums can be incredibly flattering-if you get the proportion right! I have one rule for wearing them: make sure the peplum's flare starts at the thinnest part of the waist and ends at the hipbone. Since you have your top, let's focus on finding the right things to pair it with. Your peplum top already has volume and structure, so it's best to wear it with simple pieces that have clean lines. One option is to go for a pencil skirt; black or grey are obvious choices, but you should also consider brighter hues like bright green, turquoise, or electric blue. Streamlined shorts would also work; Marc by Marc Jacobs has a cute pale khaki pair, or you could go for a high-waisted style in blue or black. Pants are, of course, appropriate too, and would balance the peplum's feminine flair nicely. You can't go wrong with black skinnies, but any simple, slim style will work. One last thing to note: if you're trying to lengthen your body, make sure you opt for a monochromatic outfit. It's just more flattering!