The charcoal Ultimate Acoustics Studio Bundle II provides 24 square feet of professional acoustic coverage, including 12 wedge-style panels and 12 bevel-style panels. The bundle includes adhesive squares for attaching the panels to the wall. Both styles of acoustic panels are 12 x 12" square and 2" thick. The acoustic foam is designed to help control troublesome mid to high frequencies, and the panels can be installed in a variety of patterns. Hang them as squares, diamonds, or any combination of both.