SIZE & COLOR OPTIONS : One size fits for most youth aged 7-16. Since our Fasoar tube socks are elastic, they can fit to most youth. Colors: Red / Green / Blue / Black / Orange / Yellow / White(2 Black stripes) / White(2 Red stripes) / White(2 Blue stripes) . Different combinations for your choosing. MATERIALS: Cotton. Our girls/boys knee high long tube socks are comfortable and healthy, since our skin-friendly materials are of high quality, which has passed strict quality testing. Our fabrics are breathable and durable which will attentively care about your feet when being used. Besides, our socks are both hand and machine washable as well. DESIGN: Classic Double stripes on the top. The 18 stripes on the top of these socks are classic and fashion, which makes our socks match to many kinds of clothes and shoes. SUPERB SKILLS: The tight and firm pins on our products are visible, since all of our workers are highly skilled, only to provide our customers a great using experience. And now, we have perfect evaluations from our old customers around the US. AFTER-SALE SERVICE: We offer 100% no risk money-back guarantee if you are not satisfied with your purchase. Just contact us and we will give you the most satisfactory solution. Please check our storefront for more slipper styles and other deals that are waiting for you!