Real black suede sling-back 3" heels with cut-outs Sz 6

Got these sling-back heels (3") from Japan. Made from genuine suede with cute cut-outs to show the toes. They are lightly worn. NOTE: I think their size markings are funky because I'm a Size 6 and it is marked '4' on the sole. Please refer to the photos of the measurement of my right foot (9.25" in length) and how the sling-backs fit me perfectly. It is lightly worn