These stickers can be applied to various kinds of hats, and you can just stick them to the inside of your hat. You can stick them on the inside surface of the hat with the adhesive back, or you can sew them on the hat in order to fix them firmly. Works with all hats and caps. Features -Color:Assorted Color -Material:EVA Foam -Size:11.00X2.00X0.20cm/4.32X0.79X0.08in -Note:It can reduce the cap circumference between 1-1.5cm/0.39-0.59in. -This hat liner pad is very suitable for hats.Breathable and absorbent, so that your skin can , will not feel stuffy. -These Cap Liners can effectively solve this problem, allowing you to easily keep the caps stay on your head. -Simply peel the back adhesive, and then stick the liner stick inside the cap lining, very simple to use. -These caps liners are mainly made of EVA foam, which has high compression elasticity and good air permeability, so that you will not feel stuffy when wearing for a long time. -The hat patch can fix the hat, making it safer and more reliable for customers to wear the hat, without worrying about the hat falling or floating . Package list: 30 Liners(Black) 30 Liners(White)