Depending on the airline, when traveling internationally there are different perks. Singapore airlines hands out little bags with a one-time-use toothbrush, toothpaste and socks to keep your toes warm on the cold planes. These socks are one size fits all.
And just to give you another perspective, I put on the same sock. However, my feet are significantly smaller. Same socks, different feet. Good thing Ryan isn’t prone to cold ankles.