Sweater-and-skirt combos land at the top of the easiest (and chicest) uniform to wear for fall. The missing piece? Which boots to step into. We did all the work for you and matched each skirt length with a boot type. Cold-proof a mini skirt with thigh-high boots (it's sexy without too much skin exposure), or give a midi skirt a lift with heeled ankle boots. Complete your fall outfits with our guide to the best and most flattering skirt-and-boot pairings out there.