12 x 18" Trim photographs, collage materials, textiles, finished artwork or stationary safely and efficiently on this self-healing, double-sided cutting mat. Ideal for artists, students, crafters and DIY makers. The mat protects surfaces from sharp blades, writing instruments and other art and craft tools. The double-sized cutting mat's resilient surface heals so completely that cutting leaves no visible trace, and repeated use actually prolongs the life of your cutting knife blade.