Isabel Marant Etoile 36 5 5.5 Brenna black otk

Brenna thigh high over the knee boots. New (tried on) .. no box but I can look for it :0. Over the knee thigh high boots. Shaft is very narrow. I have pretty scrawny legs and these were the best fitting boots I've ever found. They run small so I need a 37 for these ..I'm usually a 6/ 6.5 - but for these, I should have gotten 36.5- 37 to accout for UK sizing . Leather. Authentic.