【STURDY AND SAFE】RLAVBL cardboard sheets are made of high-quality three-layer E-flute corrugated board. It is extremely strong and sturdy and ensures the safety of the items you are shipping or mailing. 【WIDE USAGE】 Brown card board sheets can be used to protect art prints, photos, CDs, books, certificates, documents, etc. It is also very suitable for your DIY crafts. 【DIMENSION】 Each cardboard sheets measure 11 x 14 inches with a thickness of 2mm, the perfect size for mailing, shipping, mailers, DIY crafts, packing supplies, or art project kits. 【DIY PLEASURE】These cardboard inserts can be practical materials for paper crafting. Providing space for children to use their imagination. Let them paint and decorate cardboard sheets to create artwork and bring lots of crafting fun. 【50 PACK CARDBOARD】 There are 50 pack cardboard sheets on the package, stored flat inside a larger carton. Boxlium 50-Pack 11x14 Corrugated Cardboard Sheets for shipping, packing, organizing, and DIY projects. For businesses, crafters, students, and daily users. Each sheet uses three-layer E-flute corrugated board. 2mm thickness, three-layer structure resists bending, tearing, and crushing. For art prints, photos, CDs, books, certificates, and documents during shipping. For shipping, mailing, and gifting delicate items. Multiple uses for the cardboard sheets: school crafts, posters, gift boxes (for children); scrapbooking, card making, model building, framed art backing (for adults); mailer inserts, envelope stiffeners (for businesses); file organizing, storage divider making, moving protection. 11x14 inches, fits standard mailers and small packages. Holds most prints and documents. Stores flat. 50-pack for bulk tasks and ongoing projects. Arrives flat in a larger carton. Light weight for easy handling. Cut, folded, or trimmed for different needs. Natural brown color. Material is recyclable. Uses include packing, protection, organizing, and crafting.