Clipboard Sizes Explained: A4, A5, Foolscap and Letter Boards

Why clipboard sizes matter to a buyer

A clipboard is one of the few stationery items where the size question is answered by the paper the end user already owns. A board that is 5mm short of the sheet it is meant to hold is a return, and a board that is 30mm oversized will not fit the trolley it was bought for. Buyers in Germany, the UK and the Netherlands tend to work from a specification list, while buyers in smaller markets work from a sample, and the two routes lead to very different purchase orders. This page sets out the paper formats behind the numbers, the board dimensions that go with each of them, and the details that decide whether a range sells.

The paper formats behind the numbers

Four paper sizes cover almost every clipboard enquiry worldwide. ISO A4 is 210 x 297mm and is the default in Europe and most of Asia. ISO A5 is 148 x 210mm and is the size sold into schools and to field staff who need something that fits a pocket. US Letter is 216 x 279mm, which is wider and shorter than A4, and it is the format for North America. Foolscap is 203 x 330mm, a UK and Commonwealth size that is taller than A4 and still ordered for legal and survey work.

• A4 - 210 x 297mm, the European default
• A5 - 148 x 210mm, the pocket and junior size
• US Letter - 216 x 279mm, for North America
• Foolscap - 203 x 330mm, for UK legal and survey use
• A3 - 297 x 420mm, for plans and artwork

Clipboard board dimensions for each format

The board is always cut slightly larger than the paper it holds. That margin is what stops the sheet curling at the corners and it is where the clip is riveted on. A standard A4 clipboard is 225 x 315mm, which leaves a margin of about 15mm on the sides and 18mm at the bottom. An A5 board is 160 x 230mm. A Letter board is 230 x 300mm, and a foolscap board is 225 x 350mm.

Heavy-duty ranges are cut larger again, because the clip assembly on a heavy-duty board is wider and the board has to carry it without flexing. A heavy-duty A4 board is often 230 x 320mm, and that extra material is what makes the board feel rigid in the hand. Where a buyer supplies a competitor sample to match, we measure the board rather than the paper and work from that figure, because the margin varies between factories.

Wall thickness and material

Board thickness is quoted in millimetres for MDF and in sheet gauge for plastic. A PVC clipboard is usually welded from 2mm to 3mm sheet, and an MDF clipboard runs from 3mm to 6mm. Thicker is not automatically better: a 6mm MDF board is rigid but it is also heavy in a stack of 50, and freight is calculated on weight as much as volume. We build our PVC boards from polyvinyl chloride sheet made to REACH requirements for European customers, and our MDF boards from FSC chain-of-custody stock, so the material declaration can be passed down the supply chain.

How clip size scales with the board

The clip has to span the short edge of the paper. On an A4 board that means a clip around 100mm to 120mm wide, on an A5 board around 80mm, and on a foolscap board around 120mm. A clip that is too narrow bites the sheet in the middle and lets the corners lift; a clip that is too wide overhangs the board edge and catches on whatever is in the bag next to it. Clip jaw opening is a separate figure: a standard clip opens about 10mm, and a heavy-duty clip opens 20mm or more, which is what lets a board hold a full pad. The three jaw shapes, flat, arch and teeth, behave differently on thin paper, and we usually recommend a flat jaw for copier paper and an arch jaw for a pad.

Custom sizes and special formats

Beyond the four standards, the requests we see most often are a landscape A4 board for site drawings, a half-letter board for the North American market, and a board cut to hold a specific form such as a delivery note or a vehicle inspection sheet. All of these run on the same tooling as the standard sizes and only the cutting die changes. Where a buyer wants a printed board, the print is applied to the flat sheet before assembly, which means a full-bleed design across the board face is possible and the clip is fitted afterwards over the print.

Packing a clipboard order for export

Clipboards are bulky relative to their value, so the pack design decides the freight cost. Boards are normally shipped in inner packs of 10 or 12 pieces with a protective layer between the clips, then in export cartons that stack to a standard pallet footprint. A carton loaded with pre-assembled boards carries a lot of air, and shrinking the carton height to the exact board count is the single easiest saving on a clipboard order. Tell us the pallet height your warehouse can accept and we will work the carton count backwards from it.

Which clipboard size sells where

A4 dominates Europe. Buyers in Germany, France and the Benelux countries order A4 boards almost exclusively, and the A5 board is a school item rather than an office one. In the UK the foolscap board is still specified for legal and survey work even though foolscap paper is far less common in offices than it was, and it is worth carrying as a single line for that reason alone. In North America the Letter board is the volume size, and it does not interchange with A4: a Letter pad overhangs an A4 board at the sides and sits short at the bottom, so a distributor serving the two regions has to stock the two board sizes. Australia and New Zealand sit with A4 for office use and with foolscap for legal work.

Weight, balance and the hand

A clipboard is judged in the hand before it is judged on a shelf. A 2mm PVC board in A4 weighs about 150g and an equivalent MDF board nearer 250g, and that difference is obvious to someone who holds a board for an hour during a stock take. Balance matters as much as weight. A clip set too far in from the edge makes the board tip forward when it is written on, and a clip set hard against the edge lets the top corner flex. On a heavy-duty board we position the clip so the centre of the assembly sits about 20mm from the top edge, which keeps the board steady without overhanging the paper beneath it.

Questions buyers ask

What size is a standard clipboard?

For the European market, the standard A4 clipboard is a board of about 225 x 315mm carrying a 120mm clip. In North America the equivalent is a Letter board of about 230 x 300mm.

Is A4 the same as Letter size?

No. A4 is 210 x 297mm and US Letter is 216 x 279mm, so a Letter pad overhangs an A4 board at the sides and sits short at the bottom. A board cut for one format will not hold the other cleanly.

Why is the board bigger than the paper?

The margin protects the sheet corners and gives the clip somewhere to be riveted. It is usually 15mm to 18mm on the sides and slightly more at the bottom.

How thick should a clipboard board be?

PVC boards run from 2mm to 3mm and MDF boards from 3mm to 6mm. For a board that will be used standing up, a thicker sheet is worth the weight. For a stack that ships by air, a thinner sheet keeps the freight down.

Can clipboards be made in a custom size?

Yes. Landscape A4, half-letter and form-specific boards all run on the same tooling as the standard sizes, with only the cutting die changed.