CLEAR PVC UPPER TRANSPARENT HEEL SANDAL A18: 5(1)5.5(1)-6(2)-6.5(2)-7(3)-7.5(3)-8(2)-8.5(2)-9(1)-10(1) B18: 6(1)-6.5(1)-7(2)-7.5(2)-8(3)-8.5(3)-9(3)-10(3) Please be aware that this style is produced by one of our vendor partners, which may result in variations in sizing and quality. Furthermore, please note that we will ship either the A18 or B18 size pack based on our current stock availability. If you have a specific preference, kindly reach out to us and let us know.