Why crafters & makers choose WestonBoxes Archival safe: Made from transparent polypropylene, our boxes are acid-free, ensuring precious cardstock, photographs, and handmade papers won't yellow or degrade over time. Precision fit: Designed to store A4 paper (210 x 297mm) with enough clearance to prevent corner-curl, but tight enough to stop contents from sliding and fraying. Industrial durability: Originally designed for the heavy-duty demands of print rooms, these boxes are built to last. Engineered for long term storage, they have the structural integrity to remain rigid even when stacked fully loaded with heavy cardstock or studio supplies. Simple efficiency: Featuring a simple base and drop-on lid design, these boxes are easy to open mid-project but stay shut when stacked. A4 storage box — frequently asked questions What size is the WestonBoxes A4 storage box and what does it hold? The A4 storage box measures 312 x 225 x 57mm externally and 304 x 216 x 55mm internally. It holds a full ream of 500 sheets of 80gsm A4 paper. The internal dimensions are sized to hold A4 paper flat without movement, with enough clearance to prevent corner-curl. What else can I store in an A4 box besides paper? The A4 box is one of the most versatile sizes in the range. Customers use it for card stock, watercolour paper, art prints, certificates, presentation documents, craft supplies, ink pads, stamps, washi tape collections, fabric scraps, and general stationery. If it fits within 304 x 216mm and is no taller than 55mm, it will store neatly in an A4 box. Is the WestonBoxes A4 box acid-free? Yes. The A4 storage box is made from acid-free PP5 polypropylene, which means it will not react with or damage paper, artwork, or printed media stored inside it. It is safe for long-term archival storage of documents, prints, and handmade work. What material is the WestonBoxes A4 box made from? The A4 box is made from PP5 polypropylene — a chemically inert, recyclable plastic that is acid-free, moisture-resistant, and durable. It is the same material used across the full WestonBoxes range and was chosen for its consistency of manufacture and long service life. Where is the WestonBoxes A4 storage box made? The A4 storage box is designed, manufactured, and quality-checked at our factory in Sunbury-on-Thames, Surrey. S.B.Weston Ltd has been manufacturing precision injection moulded products in south west London since 1948 — originally from a factory in Teddington, then on Platts Eyot, a small island in the Thames, before moving to the current Sunbury-on-Thames site in 2002. When you buy a WestonBoxes product, it is genuinely made in Britain — not just branded here.