36 x 12 x 12" Double Wall Boxes. Twice the protection of a standard carton. Boxes are manufactured from heavy-duty 275# D.W. /ECT-48 kraft corrugated. Heavy-duty construction provides greater protection and stacking strength. Corrugated boxes are reusable and recyclable. Cartons are sold in bundle quantities and ship flat to save on storage space and shipping. Proudly made in the USA