We are sorry to hear that the hat you received does not fit as expected. Based on the product details, it is made from a 50% recycled polyester and 50% acrylic blend with a narrow rib knit, and it is designed as an 11" knit with a cuff. We understand that fit is just as important as style, and it appears this particular hat may run smaller than anticipated. We would be happy to recommend alternative options from our available range that may offer a more comfortable fit for adults. (https://www.vistaprint.com/clothing-bags/hats/beanies) If your request is urgent and you need an immediate solution, please reach out to our Customer Support team via: https://www.vistaprint.com/customer-care/help-center/].