Hi everyone, I love this lounge and you all with all your amazing wisdom. I have come to the problemof half sizes (working with the metric system) I need to make a hat with a 56,5 cm head size...I have a 58 cm hat block but this would be to big. Getting a 57 would be to small? When the sweatband comes in. How do you manage? Do you also have hat blocks for oval and round shapes?