RIDING BOOTS - Under the knee -Shaft Height: 11 in. -Heel Height: 1 in. -Types of Closures: Full Zipper (12 in.) -Shaft Circumference: 5.75 in. - Colors: Black, Brown, and Tan - Size: 12 pairs 12A: 5.5(1)-6(1)-6.5(2)-7(2)-7.5(2)-8(1)-8.5(1)-9(1)-10(1) 12B: 6(1)-6.5(1)- 7(1)-7.5(1)-8(2)-8.5(2)-9(2)-10(2) - Unless indicated otherwise in the comment section. If the size pack you ordered is not available, we will ship the next size run available.