Extensions not only add length, but you can choose to add volume instead (or in addition to length), which is perfect for fine, limp or thinning hair. If your existing hair is as little as 3 inches long, you can get extensions, although the extent of your transformation may be limited if your hair is very short. Extensions can be braided in, glued in, woven in, or if you only need a follicular boost for a special event clipped in. You can also add highlights or color with shades ranging from mild to wild. The process isn’t painful, so it shouldn’t hurt a bit.