POLO BCS Baby Baby Flight Cap Ear Flaps Pom-poms - Material: 100% Polyester - Size: 42cm - Brand: POLO - Design: Cap with pom-poms - Color: Beige Baby Hat Pom-pom Hat Flight Cap With ear flaps For baby hats, which babies outgrow quickly, it's good to choose a size that is "head circumference + 3cm". For kids, it's a good idea to choose a size that is "head circumference + 1-2cm". 〈Hat sizes for newborns to around 1 year and 6 months〉 ※ The following is based on "average head circumference + 3cm" as a guide. ・0-3 months …… 40-42cm ・3-6 months …… 42-44cm ・6 months - 1 year …… 44-46cm ・1 year - 1 year and a half …… 46-48cm