Why is it that every season designers must unload a crazy new pants shape on us? Weve been through high-waisted, stovepipe and harem styles, and now, for fall, its all about the pegged leg. Slightly easier to wear than the others, the pegged pants at Marc Jacobs and Donna Karan were full at the top and tapered to the ankle. One advantage? Pegged pants are the perfect thing to show off a fabulous new pair of shoes.