Come and Check Our Branding Solutions.This baby sun hat is made of quick-dry and sun protection polyester material. The wind strap under the chin to keep it from blowing away. Wide brim offers better sun protective for our babies. There 3 sizes can choose, 17.3"-18.1" fits 0-6 Months; 18.1-19.7" fits 6months-3 Years; 19.7"-21.2" fits 3-8 years. The age is only for reference, you can choose sizing according to your baby's head girth. Pls check inventory and detailed info before placing your orders.