We have the technology! We can stretch them! We fulfilled our number one customer request and developed a way to create our awesome designs on stretchier socks. These babies can stretch up to 21 inches in circumference. Our threads are certified by OEKO-TEX Standard 100, which means we leave out harmful chemicals to keep your skin safe and happy. Make your feet happy with these durable, super-soft, high-quality socks. Unisex; fits up to women's size 12 and men's size 13, approximately.