Framed Cork Board Large, Signore Bronze Wood: Outer Size 40 x 28" Corkboard is made with 1/4" thick cork layered over a solid surface backing for strength and stability. Corkboard Frame is made of solid wood molding Corkboard used is a natural renewable wood material that's recyclable and biodegradable Finished corkboard is professionally handcrafted in Madison, Wisconsin Ready to hang vertically or horizontally for easy installation.