Black shiny Bamboo brand rain boots. Equivalent to size 6.

Bamboo brand rain boots. They say size 38 but in US size the chart says a size 6. I’m between 6.5/7 & they fit fine so I feel they are bigger than a 6. I bought them at Zappos outlet. I’ve learned I don’t care for tall rain boots. Worn twice. Small imperfection on left boot as shown. May be dusty from storage. Smoke free home.