Blank fitted Otto hats and Custom fitted Otto hats are one of the popular styles of blank hats available in the market. Fitted Otto hats got their name from the fact that you cannot adjust their size. These Otto hats have closed backs with no opening and have a stretchable fabric that wraps around your head. Fitted Otto hats come in different sizes (S to XL depending on the item) and it is better you measure your head to make sure you get the best fit. People like blank fitted Otto hats becaus