Gr&ouml;do (Groedo) 100% Organic Merino Wool Baby Children Socks (1 Pair) Made in Germany 100% Made in Germany 100% Organic Fine Merino Wool Certified by GOTS (Global Organic textile Standard) Thick, warm, and soft. Size 9-12 months US shoe size 2 - 2 1/2 (foot length 3 7/8- 4 1/8"). Size 12-18 Months US shoe size 3 1/2 - 4 (foot length 4 3/8 - 4 5/8"). Size 2 Years US shoe size 5 - 6 (foot length 4 7/8 - 5 1/8"). Size 3 Years US shoe size 6 1/2 - 7 1/2 (foot length 5 3/8 - 5 5/8"). Size 4 Years US shoe size 8 - 9 (foot length 5 7/8 - 6 1/4"). Size 5 Years US shoe size 10 - 10 1/2 (foot length 6 1/2 - 6 3/4"). Size 6 Years US shoe size 11 1/2 - 12 (foot length 7 - 7 1/4"). Size 7 Years US shoe size 13 - 1Y (foot length 7 1/2 - 7 3/4").Size 8 Years US shoe size 1 1/2 Y - 2 Y (foot length 8 - 8 1/4").