1. 【Hat Size Extender】: This baseball cap silicone adjustment buckle is designed with simplicity and convenience in mind, providing a sturdy fixation for your hat 2. 【7 Holes】: Featuring a 7 holes buckle design for duckbill caps, it allows you to adjust according to your head circumference, ensuring the comfort of the hat 3. 【Premium Material】: The hat extender is made of silicone material, waterproof and lightweight, capable of withstanding harsh weather conditions without damage 4. 【Proper Size】: The hat snap buckle is in size 6.5cmx1.9cmx0.7cm/2.56inchx0.75inchx0.28inch, allowing for flexible adjustment of the hat size, enabling you to wear it comfortably anytime and anywhere 5. 【Versatile Use】: The replacement hat snap buckle is widely suitable for all types of hats, whether baseball caps or duckbill caps, it provides a proper fit 6. Specification: Material: Silicone 7. Size Chart: 6.5 cmx1.9 cmx0.7 cm/2.56 inchx0.75 inchx0.28 inch 8. Package Includes: 1 Hat Size Extender(4 Pack) 9. Note: Please allow slightly errors 1-2cm differences due to manual measurement.