Dimensions are 10 x 12 1/4 x 6 1/2" and 10 x 15 1/4 x 6 1/2"Economical and permanent file storage. Half-size design holds manageable weights and is great for use on high shelves. Doubled ends and bottom provide additional strength. Includes hand cut-outs for sure grip and easy transport. We recommend items be placed in archival quality file folders prior to storage (keyword: archival file folders), available and sold separately.Ships flat for easy storage and lower shipping cost.Specifications: Acid-free Lignin-free pH 8.0 - 9.5 B-flute corrugated (exceeds 200 lb. test) Blue 3% Calcium carbonate bufferTo view assembly instructions, simply click on the Product Guide button located above.Inside dimensions:ASB10126 (letter): 10 x 12 1/4 x 6 1/2" ASB1012 (legal): 10 x 15 1/4 x 6 1/2" Note: It's recommended that blueprints, cyanotypes (old blue photos), albumen prints (a photograph printed on paper that is coated with an emulsion of egg whites) and early color photographs be protected and stored in unbuffered material.