CrocsUnisex Kids Crocband Clog K, Color: Deep Green/Prep Blue, Size: 29/30 EU

what size is that exactly according to crocs size chart ? It’s written 37/39, but its not in the size table, I need M6W8

My kid foot size is 19 inch he is 8 year old which size fot him.

My feet are 26cm long, which one is suitable?

Is it suitable for adult 43 size ?