Aetrex UK to US size chart:

Experience next-level comfort with Savannah, a fully adjustable quarter-strap sandal, designed with innovative BioRocker™ Technology for a natural, effortless stride. hook & loop provide a secure, customized fit, while the premium leather upper adds durability and style. The EVA midsole and rubber outsole deliver lightweight support and traction. The SkyTech™ microfiber-wrapped footbed, cobra heel pressure relief, and raised met-pad cushion offer targeted comfort and all-day cushioning. Plus, ensure wellness from the ground up. Each Aetrex shoe is anatomically designed based on data and learnings from over 50 million global foot scans. This ensures you’re getting the best fit for your feet and premium support for your body from the ground up.