The black 11 cm platform sandals provide an unusually useful foot-length ladder: selectable size 35 is marked for about 22 cm, size 36 for 22.5 cm, continuing in half-centimetre steps to size 41 for 25 cm. Use that ladder first. The headline height and the forefoot platform are a separate decision.

Record your foot length before choosing a number

Stand on paper, mark heel and longest toe, and measure both feet in centimetres. As a worked example, a measured 23.5 cm corresponds to the listing’s size 38 row; 24 cm corresponds to size 39. If your measurement falls between printed points—say 23.7 cm—this chart does not explain which adjacent size will give enough toe and strap room. Ask for the finished footbed length and width in both sizes. Do not substitute an insole measurement from a different shoe for your standing foot length.

Treat the 11 cm label and 5–7 cm platform as different dimensions

The title and color label say 11 cm, while the specification puts the platform at 5–7 cm and the heel in an above-8-cm category. Those statements do not provide a measured heel-to-toe drop. Subtracting an assumed 5 or 7 cm from the title would create an unverified slope. If slope matters to you, request the vertical heel rise and forefoot platform rise measured on the same size from the same floor reference.

The source lists a cloth upper, EVA insole and EVA outsole, and calls the sandal a wedge/flip-flop style. It does not give a strap-adjustment range or a width chart. Compare the product photos with how much upper coverage you need, then confirm width and the two height measurements before ordering; material names alone do not prove comfort or grip.