This is a knitted hat made with yarn that is 80% acrylic and 20% polyester. It has a beautiful gradient design. The image appears brighter, but the actual hat has a very calm and subdued gradient. ○ Hat Size Suitable for head sizes of 57-58cm Height (laid flat): Approximately 21cm The mannequin's head size is a smaller 55cm. Even with my head circumference of 57cm, the opening is comfortably loose.