Filing Cabinet Dimensions UK: A4 vs Foolscap & Drawer Standards

UK filing cabinets are sized around two paper formats that are still not interchangeable. A4 is 210mm by 297mm under the international ISO 216 standard, while foolscap survives as the common width for suspension files because the extra tolerance lets A4 documents drop in without catching. Our 2026 reference explains why a foolscap cabinet accepts both file types while an A4 cabinet accepts only one, and publishes the standard heights, widths and depths for two, three and four drawer units, desk pedestals and side filers, each with the clear floor space needed in front. We cover the three measurements buyers get wrong, why rail to rail width matters more than external width, why drawer extension rather than cabinet depth determines the footprint, and why anti tilt interlocks are a requirement on tall units carrying loaded paper. Furniture in Fashion publishes this as specification guidance rather than a manufacturing standard....