Please note: The products are sent randomly, not necessarily in the pink color in the picture. Please buy with caution. This product is vacuum-packed and it is recommended to leave it for 3 days before use to restore it to a round shape. Material: These hair rollers are made of sponge and plastic, with a soft and lightweight design. They are safe and comfortable, so you don't have to worry about damaging your hair. Perfect for both women and children. Easy to use: The rollers grip your hair without the need for pins or clips. Just open the fixed plastic band, wrap your hair around the roller, close the band and go to bed. Wake up to beautiful curls. Save time: You can use these foam hair rollers when you sleep. The soft material will not disturb your sleep and you can create different hairstyles without damaging your hair. Multifunctional: These hair sponge rollers can also be used as hair ties to roll up your bangs during daily makeup, facials and so on. Perfect for home, hotels, beauty salons and more. Size 4.0 cm