SIZE & FORMAT: Blank 15x18 art mat board sheets with no opening, ready for custom cutting, mounting, or creative projects. Size listed reflects the full outside dimensions. QUANTITY: Includes 1 Individual Art Mat Board. Mat only - frame, backing board, and bags are not included. MATERIAL & QUALITY: Art-quality mat board suitable for cutting and display, custom-cut and made in the USA for consistent quality and precision. COLOR OPTIONS: This listing shows Earthen Gray. Additional colors, textures, and material options are available in our store - search our listings to find the style that complements your artwork. USE CASES & NOTES: Ideal for art display, crafts, mounting artwork, classrooms, studios, and bulk projects. Color may vary slightly by screen.