Features: 1) Materials: a) Outer: special paper/128g copper board paper b) Inner: 2.0-2.5mm grey board 2) Color: blue 3) Printing: 4-color printing 4) Size: 41.5 x 31 x 9cm Disclaimer: The pictures relevant to this product have been provided for reference only. We do not have any intellectual property rights over the trademark(s) displayed, and are not selling any products containing this/these marks.