- Size: 55-60 • One size fits all: this knit hat fits most adult head sizes (7.87 inches wide and 10.63 inches long when unfolded). It is not too tight to cause discomfort on the head, nor too loose to slip off easily, offering a comfortable fit for adults of all head sizes. • Classic design: this knit hat has a classic retro design, the solid color design is simple and generous, making the hat more versatile. The rounded and smooth shape of the dome hat not only modifies the head line but also makes the hat more comfortable and does not bring a feeling of pressure to the head. • Multiple occasions: this knit hat can be paired with any style of clothing. Whether you're going shopping or gathering with friends, it will bring you comfort and style. For outdoor athletes, this knit hat is also indispensable to keep you relaxed while doing sports. • About the material: this knit hat is made of a blend of 80% acrylic and 20% polyester, making optimal use of both materials. Acrylic provides a soft touch and a wide range of colors, while polyester gives the hat elasticity. • Washing tips: this knit hat is machine washable, so you don't have to spend too much time and effort cleaning your hat in your busy life. When washing, you should choose the gentle cycle with cold water, and if you need to iron it, make sure to choose low-temperature ironing.