Aetrex UK to US size chart:

Feel all day comfort in the Juliet! This classic lace up boot is made out of leather and features a side zip for easy on and off. The arch support and cushioning keeps you comfortable while staying effortlessly stylish. 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.
The Aetrex Orthotic System is Built-In to every pair:

• Our insole features arch support that helps to stabilize your body, align your feet and relieve common foot pain (ie. plantar fasciitis, heel pain & arch pain)
• Our insole features UltraSky™ cushioning to provide pressure relief & extra comfort
• Our insole is lined with microfiber treated with antimicrobial technology to help fight every day odors