Image: M-Boss Inc. Peterson's Perfect Squares Aluminum Ceiling Panel with Mill Finish -- 24 3/8 in. x 24 3/8 in. (Nail-up); 23 7/8 in. x 23 7/8 in. (Lay-in) Dimensions

M-Boss Inc. Peterson's Perfect Squares Aluminum Ceiling Panel with Mill Finish -- 24 3/8 in. x 24 3/8 in. (Nail-up); 23 7/8 in. x 23 7/8 in. (Lay-in) Dimensions