Quartet Cork Board Tiles, 12" x 12", Corkboard, Mini Wall Bulletin Boards, Modular, Dark Brown, 4 Pack (15050Q) 12 x 12 inch square tiles are 3/8 inches thick, dark brown and frameless; 4 cork tiles per pack Cork is fully tackable and self-healing for long-lasting use without unsightly pin holes; self-stick adhesive pads are included for easy mounting Modular cork tiles create a durable, noise absorbing display surface; create your own design, use each tile alone or group together as a set