This pretty hat is made with 100% Peruvian Ultra Pima Cotton. Hand knit in a pattern of eyelet and zigzag seed stitch detailing. It will fit a baby of 3-4 months and up, depending on head size. The head circumference on the model is 16 inches but the lace pattern allows for a lot of stretch so it should fit for some time beyond that. Made in my pet free/smoke free home.