PACK CONTENTS - Pack includes 30 pieces of A4 size corrugated cardboard sheets, each measures 30 x 21 cm, perfect for various craft projects and packaging needs. PREMIUM CONSTRUCTION - Our a4 cardboard sheets are made from triple-layer extra hard brown corrugated cardboard with 3mm thickness, providing excellent rigidity and durability. MAILING PROTECT - This craft cardboard is suitable for wrapping postal packages and can be placed at the bottom of the box or around the package to avoid collisions and protect the shipping items. EASY TO USE - The 3mm cardboard sheets can be cut, folded, wrapped and glued effortlessly, ideal for creative application, and you can color and decorate them according to your own inspiration to enjoy the fun of making crafts. VERSATILE USE - The 3mm thick cardboard is ideal for painting, modelling, arts and crafts, flower pressing, packaging materials, signs making and creative DIY applications, perfect for artists, crafters, and anyone requiring sturdy cardboard sheets for their projects.