Measuring filing cabinet drawer depth for A4 files

UK Filing Cabinet Sizes: A4 Depths 330–350mm, Standards Aware Specs

Two-drawer cabinets typically span a moderate depth and height range, three-drawer units add additional height, and four-drawer cabinets are the tallest standard size, all designed to hold A4 lever-arch or suspended files. The right approach is to decide your file format first, since internal usable depth and anti-tilt load ratings matter just as much as the external footprint.

TL;DR:

  • Most UK four-drawer cabinets measure around 1,320 to 1,330mm in height, making them suitable for standard office ceilings but requiring careful space planning.
  • Internal drawer depth for lever-arch files should be at least 330 to 350mm, and suspended-file drawers need additional width to fit full pockets comfortably.
  • Check access routes and doorways by measuring the narrowest points along the delivery path, including lifts and stairwells, and compare them to the cabinet’s external dimensions.
  • Heavier steel cabinets can be difficult to move when fully loaded, so consider weight and floor load capacity, especially in buildings with suspended timber floors or no lifts.
  • Always request detailed internal and external dimensions, load ratings, and stability certifications from suppliers, and specify these exactly in procurement documents.
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Table of Contents

Typical external dimensions by drawer count and common UK footprints

Filing cabinet width tends to fall into two bands: slim single units around 279 to 413mm wide, and wider double-file cabinets built for side-by-side suspended files. Depth varies more by purpose than by drawer count. Cabinets designed for suspension filing generally sit at 400 to 470mm deep, while desk-height storage units built to double as worktops or printer stands often extend to 600 to 800mm.

Height scales predictably with drawer count, though exact figures vary by manufacturer and finish:

  • Two-drawer cabinets commonly measure around 279 x 380 x 590mm up to roughly 413 x 400 x 672mm, depending on width and depth options.
  • Three-drawer cabinets typically add another 350 to 400mm of height over a two-drawer equivalent, landing near 1,020 to 1,090mm tall.
  • Four-drawer cabinets are the tallest standard configuration, usually between 1,320 and 1,330mm, matching worktop-height storage runs in larger offices.
  • Desk-high pedestals and under-desk units stay lower, generally 600 to 730mm, to slide beneath standard desks without obstructing legroom.

Material and finish affect these figures only marginally. Steel-cased units with reinforced drawer runners can add a few millimetres to overall width or depth compared with lighter melamine-faced options, but the difference rarely changes which category a cabinet falls into. What matters more is matching the footprint to the filing format you actually use, which the next section covers in detail.

How cabinet dimensions map to A4 lever-arch and suspended files

Cabinet sizes aren’t arbitrary. They’re built around the physical dimensions of what goes inside them. CEN/TR 14073-1:2004 sets out recommended dimensions for office storage furniture based on stored-item sizes rather than prescribing one fixed cabinet size for every use case.

A standard A4 lever-arch file measures approximately 320 x 290mm, and suspended-file pockets typically range close to 275 x 330mm or 262 x 318mm depending on the frame system used. This is the reference point manufacturers design against, according to CEN/TR 14073-1.

To accept lever-arch files comfortably, a drawer needs internal depth of at least 330 to 350mm, allowing clearance for the file spine and any tabbed dividers. Suspended-file drawers need slightly less depth but require internal width that accommodates the full pocket plus frame rails, usually adding 20 to 30mm beyond the pocket’s own dimensions.

A4 file sizes and cabinet clearance dimensions

The standard also recommends aligning desk-height storage with fixed-height work tables, referencing EN 527-1 conventions so pedestals and desks sit at compatible heights. None of this prescribes a single “correct” cabinet, which is precisely why checking internal dimensions against your file format matters more than comparing external sizes alone.

What to measure before you buy

Getting the external footprint right on paper is only half the job. The cabinet also has to reach its final position, which means checking access as carefully as fit.

  1. Measure the room clearance where the cabinet will stand, including space for drawers to open fully.
  2. Check doorway, lift and stairwell widths along the delivery route, not just the final room.
  3. Record external height, width and depth, then compare against the supplier’s datasheet rather than a generic category average.
  4. Confirm internal drawer depth and aperture height, since these determine whether A4 lever-arch files or suspended pockets fit without forcing.
  5. Allow extra clearance for handles, skirting boards, cable trays and any desk overhang that could reduce the usable gap by 20 to 50mm.

Before ordering, ask suppliers directly for inner drawer depth, drawer aperture dimensions, per-drawer load rating and whether the anti-tilt mechanism has been tested. A CAD drawing request costs nothing and removes most site-fit guesswork.

Pro Tip: Measure your narrowest access point twice, once with the door or lift gate fully open, since diagonal clearance often differs from the stated width.

Under-desk pedestals and mobile storage: sizes and when to choose them

Mobile pedestals solve a different problem than full-height cabinets. Where a four-drawer unit maximises storage volume, a pedestal prioritises reach and mobility, usually sitting 600 to 700mm deep and narrow enough to tuck beneath standard desks without blocking knee space.

Standard UK desks generally have heights near 720 to 730mm, so a pedestal should clear that height while allowing room for a keyboard tray or seated legroom.

  • Choose a mobile pedestal when you need personal, lockable storage that moves with a hot-desking setup or changes location occasionally.
  • Choose a full-height cabinet when the priority is shared departmental filing capacity rather than individual access.
  • Check castor height on mobile units, since this adds 15 to 25mm to the stated cabinet height and can affect desk clearance.

The trade-off is straightforward: pedestals win on flexibility, cabinets win on capacity.

Stability, load and procurement specifications to request

External dimensions tell you whether a cabinet fits the space. They tell you nothing about whether it’s safe to load fully and leave unattended, particularly in shared offices, schools or healthcare settings where cabinets see heavy daily use.

BS EN 14073-3:2004 defines the test methods for stability and structural strength of free-standing storage furniture, and it deliberately separates this performance testing from the dimensional guidance covered earlier. A cabinet can match your space perfectly and still need proof it won’t tip when every drawer is fully extended and loaded.

When specifying storage for shared or public-facing spaces, ask suppliers for:

  • Per-drawer load rating, stated in kilograms, not just a general capacity claim.
  • Anti-tilt mechanism confirmation, ideally with reference to BS EN 14073-3 test methods.
  • Full-width drawer load tolerance, since a cabinet loaded across its entire width behaves differently to one loaded at the front.
  • Test reports or certification documents supporting stability claims, available on request from the manufacturer.

Pro Tip: For healthcare or education procurement, request the anti-tilt test method reference explicitly in your tender document rather than accepting a general safety statement.

Writing cabinet sizes into procurement documents

Procurement briefs move faster when dimensional requirements are specific rather than descriptive. Instead of writing “standard four-drawer cabinet,” specify the figures directly.

  • External overall dimensions: state width, depth and height in millimetres, sourced from the manufacturer’s own datasheet.
  • Internal usable depth: specify the minimum drawer depth needed for your file format, referencing lever-arch or suspended-pocket sizes.
  • Drawer aperture height: state the clearance needed for box files or lever-arch spines to load without catching.
  • Finish and certification: name the required finish and ask for BS EN 14073-3 stability confirmation in writing.
  • CAD and delivery details: request scaled drawings and confirm installation is included, not assumed.

For a working example, ALXR’s 3-drawer filing cabinet datasheet shows how these fields are typically presented together.

Typical weight of filing cabinets by size and material

Weight matters for two practical reasons: floor loading in older buildings and how many people you need for the move. Steel cabinets are considerably heavier than their melamine-faced counterparts of the same footprint, largely because of the gauge of steel used in the drawer runners and outer casing.

A two-drawer steel cabinet is generally light enough for two people to reposition once empty, while a four-drawer steel unit fully loaded with suspended files can become genuinely difficult to move without a sack truck or furniture dolly, since paper adds substantial weight once drawers are full.

Melamine-faced or lighter-gauge steel units weigh less empty, which makes them easier to reposition during office reconfigurations, but they typically carry lower per-drawer load ratings as a result. This is worth checking against your intended contents before ordering, particularly for departments that store dense paper archives rather than lightly used reference files.

For upper floors without a lift, or for older buildings with suspended timber floors, it’s worth confirming point-load tolerances with a facilities manager before specifying a fully loaded four-drawer run, since the combined weight of cabinet and contents can be considerable once several units sit side by side.

Price ranges linked to different cabinet sizes and features

Filing cabinet pricing in the UK tracks fairly closely with size, material gauge and certified load capacity rather than brand alone. Smaller two-drawer units in standard finishes sit at the lower end of the market, while four-drawer steel cabinets with certified anti-tilt mechanisms and higher load ratings command a premium, reflecting the additional steel, reinforced runners and testing behind them.

Finish also plays a role. A basic painted finish costs less than options like Arctic White or other premium colourways, and lockable versions typically add to the base price of an equivalent unlocked unit.

Mobile pedestals generally sit at a lower price point than full-height cabinets of comparable build quality, reflecting their smaller footprint and lower material volume, though castors and lockable drawers can narrow that gap.

Rather than quoting a single figure that quickly goes stale, the practical approach for procurement is to request current pricing directly against your specified dimensions, finish and load rating, since these three factors move the price more than drawer count alone.

Delivery and installation considerations

Getting a cabinet into the building is often the part procurement teams underestimate. Full-height four-drawer units, particularly in steel, are bulky enough that standard courier delivery to a reception desk isn’t always practical, especially where the final location is several floors up or through narrow corridors.

Before confirming an order, check whether delivery includes carrying the unit to its final position or drop-off only at the building entrance. Installation should cover assembly where the unit ships flat-packed, levelling on uneven floors, and fitting anti-tilt restraints where cabinets are being wall-fixed as an additional safety measure in busy or public-facing spaces.

Allow clear floor space around the delivery point for assembly, since flat-packed cabinets need room to lay out panels before building upright. For multi-unit orders, such as a bank of four-drawer cabinets along one wall, confirm whether the installer will also handle final positioning and alignment, since a row of slightly misaligned cabinets looks unfinished even when each unit is correctly assembled.

Nationwide delivery and installation services remove most of this coordination burden for larger orders, particularly where multiple cabinets, pedestals or matching desks are being installed across several rooms or departments at once.

Delivery and installation considerations — overview diagram

What I’d recommend for different buyers

For small offices, prioritise desk-height pedestals that fit your existing desks without eating floor space. Procurement teams should specify internal drawer depth and BS EN 14073-3 anti-tilt confirmation in every tender, not just external size. Healthcare buyers need certified load ratings above general capacity claims. Whichever category you fall into, fix your file format first, then match footprint and safety specs to it.

— Syed

How ALXR can help with specification and delivery

Once you know the footprint and internal dimensions you need, the next step is getting a confirmed datasheet rather than guessing from a category average. ALXR’s product pages list exact external and internal dimensions for filing and storage units, alongside the Titan Premium Folding Exam Desk and paired desk and pedestal options.

Titan Premium Folding Exam Desk

  • Space planning support to confirm a cabinet or pedestal fits your room before you order.
  • Nationwide delivery and installation, including assembly and positioning for multi-unit orders.
  • Twin Upright Rectangular Desk + Slimline Steel Pedestal options in 600mm and 800mm depths for different desk configurations.
  • Warranty support backed by NHS-approved supplier status for healthcare and public sector buyers.

Browse the full range of storage and filing solutions to request exact dimensions or a quote for your project.

Sources

For dimensional guidance, CEN/TR 14073-1:2004 remains the primary reference, while BS EN 14073-3:2004 covers stability and strength testing. If you’re specifying storage for regulated documents, this confidential waste policy guide is a useful companion for retention planning.

FAQ

What sizes do filing cabinets come in?

Filing cabinets generally come in two, three and four-drawer configurations, with two-drawer units around 590 to 672mm tall and four-drawer units reaching roughly 1,320 to 1,330mm. Width typically ranges from 279mm for slim single units up to wider double-file cabinets, and depth depends on whether the cabinet is built for suspension filing or desk-height use.

In the UK, cabinets are built around A4 and suspended-file dimensions rather than the US legal paper size, since CEN/TR 14073-1 bases its recommendations on European paper formats. If you need to store legal-size US documents, check the internal drawer depth against that paper’s dimensions specifically, as standard UK cabinets aren’t designed around it.

What are the standard office cabinet sizes?

Standard office cabinets typically fall into two, three and four-drawer bands, with height scaling by roughly 350mm per additional drawer and depth generally between 400 and 470mm for suspension filing. Desk-height storage units built to double as worktops often extend deeper, to 600 to 800mm.

What is the typical size of a 4-drawer filing cabinet?

A four-drawer filing cabinet is typically around 1,320 to 1,330mm tall, with width and depth matching whatever two and three-drawer variants in the same range use. It’s the tallest standard configuration, designed to maximise storage capacity while still fitting under standard ceiling heights in most UK offices.

How do I check a cabinet will fit through doorways and lifts?

Measure the narrowest point along the full delivery route, including doorways, lift interiors and any stairwell turns, not just the final room. Compare this against the cabinet’s external dimensions with any handles or feet included, and request the supplier’s exact datasheet rather than relying on a general category size.

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