Every now and again we come across some really unique Hunger Games merchandise and these would definitely qualify! Newbury Comics is selling (via Amazon) Hunger Games Katniss Knee Socks. They do not have a size on them, but I am betting that they fit girls/women size 5-9 because that’s the usual range for novelty socks of this type.
The socks are made by NECA and were part of the release of Hunger Games merchandise before the Mockingjay book release. They are black and yellow with “The Hunger Games” written on the foot, “Katniss” written up the leg, and the Mockingjay at the top. You can get them through Amazon for between $7 and $10 plus shipping.