※ This product is made of natural rubber, so those with allergies should not purchase it. Cross-tie bands from Leifheit, Germany. These rubber bands are convenient for bundling magazines, cards, and more. One band can securely hold items both vertically and horizontally, and their elasticity allows for a wide range of uses. Package size: 63 x 147 x 29mm Material: Natural rubber Contents: 30g ※ Includes an assortment of red, green, yellow, and purple rubber bands. 【Size Guide】 LL size / A4 size, L size / B5 size, M size / A5 size, S size / CD size. This is an assortment of the above 4 sizes. I use them to prevent my fountain pen case from opening.