I didn't just see socks at the Petrie Museum at University College London - I noticed a few other interesting bits of textile as well.
Right next to the socks was a collection of spindles - these are what first caught my attention. You'll notice one of them has a hook - meaning it was used as a high-whorl spindle.
There were also some balls of vegetable fiber yarn, made from flax or rushes. It boggles the mind that this sort of stuff has survived over the centuries - textiles are terribly fragile, compared to say artifacts made from stone or metal or even wood.
There was even some intact netting made with similar thread - the caption says this netting is made "with fine thread and complicated knots".
See all of my Egyptian textile photos from the Petrie museum on Flickr.