Stainless Steel bookmark with ruler and pattern for creativity fun children school modern design (Set of 4 pcs -- 15cm) Korean office supply design Made of stainless steel - light, solid and durable, good for years of use Built-in metric ruler and unique patterns to make creative markings Glossy and smooth, with classic grid hollow design, this bookmark shows great aesthetic beauty. Two sizes to choose from: Large=19cm, Small=15cm