Dimensions are 10 x 15 x 12"Accommodates either letter- or legal-size documentsThis durable storage carton will also house a variety of our mix and match interior trays (keyword: interior trays), available and sold separately.B-flute is 1/16" thick. Doubled ends and bottom create a stronger box. Hand cut-outs facilitate lifting. Assembles without tape or adhesive.For added protection when storing artifacts or other delicate items, wrap items in shredded or regular acid-free tissue, or line with archival quality batting, volara (polyethylene foam), felt, unbleached flannel or polysuede (keyword: padding).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: 10 x 15 x 12"Note: - Cellulose fibers (cotton, flax, jute, ramie and rayon) may be stored in either buffered or unbuffered paper products. - Protein based materials (silk, leather, furs, wool, etc.) are sensitive to alkalinity and should not be stored in contact with buffered products. Lining the box with unbuffered tissue or paper will provide a safe environment. - If you are unsure of your fabrics, or if they are of mixed fibers (e.g., a linen sampler with silk embroidery), choose unbuffered materials. 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.