A charming blue, red and light green hat for a child size 6 mos-1 year. Hand washable or machine wash cold and air dry. WILL SHRINK if washed in warm water and/or dried in a machine. The yarn is Egyptian cotton (red) and 80% cotton/20% wool Brown Sheep Cotton Fleece (blues), which is a little bit stretchy, soft and not too hot for summer, but warm enough for a cool spring or fall day. Very comfortable! To make sure it will fit, you can measure your baby's head at its widest point using a piece of yarn or measuring tape and then compare that to the size on the yardstick pictured, doubling the length, and allowing for about 1/2" of stretching (the hat should be about 1/2" smaller than the child.) The inside circumference is 47 cm or 18 3/8 in.