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 grow by 2/3, the single numbers are 1/3 more, which is reflected in the half. For example; 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 continues like this. The numbers that appear as half are actually sent as 1/3 for odd numbers and 2/3 for even numbers. Thank you for your interest.