|"Harry, your eyesight really is awful."
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Merlin's Self-supporting Socks was a brand of socks sold at Gladrags Wizardwear that, judging by their name and their picture, could stand upright on their own. They were men's full length socks, made of 100% fine wool. Gladrags put out an advertisement for a variety of their products in the Daily Prophet sometime in the 1990s, including these socks. The advertisement announced that they were now being sold 3 for the price of 2.