Zara Platform Shoes

Beautiful black and white polka dot coated canvas platform Oxford shoes. NOTE: The size on both the tag and on the label is EU36/USA6, BUT! the outsole measures 10.4", which according to Zara size chart is size 8??? Not sure if they just put a wrong size on them🤨 Listed them under 8 as per measurements. Can someone with size 8 shoes PLEASE let me know if I estimated it correctly 🙏, as l am size 5.5 and all I know is that they are way too big on me 😄