These are Okamot's Marude Kotatsu Socks, designed for sleeping. They use heat-generating material to warm two acupressure points: San'in-ko and Shi-mink. The open toe design prevents overheating, ensuring comfort. Recommended for those who have cold feet and difficulty sleeping in winter. *The outer packaging bag will not be included (only the socks), but the item is new and unused. Please purchase only if you agree to this. The dimensions of each sock vary. Even within a single pair, the left and right socks may not have identical dimensions. Two socks with similar dimensions are paired and sold as a set. Furthermore, the dimensions may change with wear and washing. - Size: 22-25 cm - Color: Medium Gray - Retail Price: 3500 yen per pair Currently, price reductions are not possible. Shipping will be via Yu-Packet Post on the same day or the next day.