If you've ever been to the San Francisco Sock Market at Pier 39, then you will LOVE this store.
The store is pretty similar to the SF Sock Market. Located in the Shops at Mandalay Bay, they've got hundreds (or thousands) of pairs of socks! Everything from ankle socks to crew socks to mid-calf socks, to knee-high socks, to stockings and leggings - they've got em all! And they've got such cute prints! I like wearing printed socks to work with my Danskos, and this store has a ton of them. I got several calf-length pairs of socks for work. One pair is black with cupcake prints all over them, another is black with green turtles on them. They've even got socks for more professional attire. If fun and colorful prints aren't your thing, they've got plain colored socks, strips, and argyle prints as well.
Such a fun store to peruse around! Excellent customer service as well. :)