Demonia Platform Keara 21 PINK Boots SEE AD PUNK Goth SEE AD 8210 1901 serial number. Based on the size and the serial number research, I feel like these are US size 10. The insoles do measure 26 cm - which, on the Demonia conversion chart, indicates these are size 10 US. For reference, I wear a size 8 to 8 1/2 and these are huge on me. However, a size 9 1/2 might be comfortable wearing these boots. 4.5 inch platform heel PINK All man made materials Round, larger than most size toe box 11.25 inch measurement heel to toe (Bottom soles) Condition is very good used