Hello, body measurements may vary from person to person, you can more easily determine the most suitable size for you by reviewing our size chart and product reviews. Adidas does not have straight production in odd numbers. Since the numbers increase by 2/3, single numbers are 1/3 more, which is reflected as half. To give an example; It continues as 36, 36 2/3, 37 1/3, 38, 38 2/3, 39 1/3, 40, 40 2/3, 41 1/3, 42, 42 2/3, 43 1/3, 44, 44 2/3, 45 1/3. The numbers reflected as a half are actually 1/3 in odd numbers and 2/3 in even numbers. Thank you for your interest.