So, we all know that knee-high boots are the big trend right now, but what should you wear under them? With winter approaching, it’s getting a little cold to just wear tights under those boots, so we’ve found some stylish socks at reasonable prices from Urban Outfitters that are thin enough to fit under those leg-hugging boots, but thick enough to keep those tootsies cozy. These Sparkle & Fade knee-high socks come in three different designs–cascading hearts, denim and solid–as well as different colors. Get three for $24 or a pair of the solid design for $7. This is the best deal I’ve seen so far–knee-high socks from Banana Republic run as much as $14 a pair…