The flexible ruler is perfect for children and it is shatterproof very easy to use and fold into your pocket and pencil box or you may carry it on your hand as a bracelet,So much fun. Bracelet ruler is kids favorites toys,a slap ruler function bring joy and practice together,just softly and into a band for children 3-10 years old teachers or adults with wristmeasure of 180mm also fit in perfectly! Feature - ColorAssorted Color - Material: Silicone. - Size: Approx. 18 x 2.5 x 0.2 cm. - Multiple Uses as a ruler of 180mm or as a slap band bracelet for children and kids. - The flexible ruler is perfect for children and it is shatterproof very easy to use and fold into your pocket and pencil box or you may carry it on your hand as a bracelet. - Packed with multiple colors and many various number packs you may choose to suit your needs. - Made with silicone material,feel comfortable to wear and lightweight. - Great for a children birthday gifts, classroom rewards, activities prizes. Package list: 4 x Rulers