A. Right here. Stores have limited floor space for special sizes, so online sources are often your best bet.
Longer pants (36-inch inseams) are available from J.Crew, Banana Republic, and Gap; find leggy jeans at Paige, Lucky Brand Jeans, and tallcouture.com (for labels like 7 for All Mankind, Hudson, and Fidelity Denim).
Little heels (one to one and a half inches) make legs look better than flats, whatever your height. If you have large feet—many tall women do—try Nordstrom for up to size 14 or barefoottess.com for up to size 15.
Horizontal lines—belts, stripes, shoulder details, waist-length jackets—counteract a beanpole look.
Too-short sleeves are a nonissue if you go for above-the-wrist or elbow length.
High-contrast colors are good. Petites have to go monochromatic to look longer and leaner; you don't.
Walk tall— none of this will work if you slump. Don't hide your height, take pride in it.