A “standard brochure” is not one object. It is a printed sheet that follows either the ISO A-series used in most of the world, or the North American inch-based series used in the United States, Canada, and parts of Latin America. Folding then changes the panel that actually sits in a display pocket. Most sizing mistakes happen at that last step: the holder is built for an unfolded sheet, while the printed piece arrives as a tri-fold.
Quick takeaway
If you need one default pairing: use a DL / rack-card pocket (about 100–110 mm wide, or 4 × 9 in) for takeaway leaflets in mixed international projects, and an A4 or US Letter full-width pocket when the piece is meant to stay flat and be read, not grabbed. Build the pocket 2–3 mm (about 1/8 in) wider than the finished insert so people can remove one copy without pinching the stack.
That pairing covers the majority of reception desks, trade-show tables, and retail literature walls. Custom sizes are common; they should be treated as custom, not forced into a “standard” pocket.
Two paper systems, not one global size
ISO 216 defines the A-series. Each size is half the area of the next larger size, with a consistent aspect ratio. A4 is the office default in Europe, the UK, Australia, much of Asia, and most export packaging artwork outside North America.
North America uses ANSI/ASME Y14.1 sheet sizes. Letter (8.5 × 11 in) is the office default. It is close to A4 but not interchangeable: Letter is shorter and slightly wider than A4. A holder cut for one will either rattle or jam the other.
DL is the other size that causes confusion. In print and envelope practice, DL is specified as 99 × 210 mm in ISO 269. Many North American “rack cards” are 4 × 9 in (101.6 × 228.6 mm). They look similar in a rack, but they are not the same sheet. A pocket designed only for 99 × 210 mm can be tight on a 4 × 9 in card, especially after lamination.
ISO / A-series and DL finished sizes
These are finished flat sizes, before or after folding, as named. Always confirm whether the supplier is quoting the flat sheet or the folded panel.
| Name | Finished size (mm) | Finished size (in, nominal) | Typical role |
|---|---|---|---|
| A3 | 297 × 420 | 11.7 × 16.5 | Posters, maps, unfolded catalogs on a stand |
| A4 | 210 × 297 | 8.3 × 11.7 | Office brochures, spec sheets, menus |
| A5 | 148 × 210 | 5.8 × 8.3 | Booklets, half-fold from A4, compact takeaways |
| A6 | 105 × 148 | 4.1 × 5.8 | Postcards, appointment cards |
| DL | 99 × 210 | 3.9 × 8.3 | Tri-fold panel from A4; rack leaflets |
| A4 tri-fold panel | ~99 × 210 | ~3.9 × 8.3 | Same footprint as DL if folded in equal thirds |
ISO 216 gives exact millimetre sizes for A-series sheets. Inch figures above are rounded for communication, not for cutting tools.
North American finished sizes
| Name | Finished size (in) | Finished size (mm) | Typical role |
|---|---|---|---|
| Tabloid / Ledger | 11 × 17 | 279 × 432 | Newspapers, large floor-stand literature |
| Legal | 8.5 × 14 | 216 × 356 | Long-form documents; less common in racks |
| Letter | 8.5 × 11 | 216 × 279 | Default US office brochure and flyer |
| Half-letter | 5.5 × 8.5 | 140 × 216 | Bi-fold from Letter; compact booklets |
| Rack card | 4 × 9 | 102 × 229 | Tourism and counter takeaways |
| Letter tri-fold panel | ~3.67 × 8.5 | ~93 × 216 | Equal-third fold of Letter; narrower than a 4 × 9 rack card |
A Letter sheet folded into three equal panels is about 3.67 in wide. Many US racks are still built to 4 × 9 in. That extra width is useful for rack cards, but a 3.67 in tri-fold will sit loosely unless the pocket has a back stop or a tighter custom width.
What folding does to the pocket
Name the folded panel when you order a holder, not only the press sheet.
| Press sheet | Fold | Panel that enters the pocket | Holder to specify |
|---|---|---|---|
| A4 (210 × 297 mm) | None | 210 × 297 mm | A4 portrait or landscape full-width |
| A4 | Half-fold | 148 × 210 mm (A5) | A5 pocket |
| A4 | Equal tri-fold | ~99 × 210 mm (DL) | DL / tri-fold pocket |
| Letter (8.5 × 11 in) | None | 8.5 × 11 in | Letter full-width |
| Letter | Half-fold | 5.5 × 8.5 in | Half-letter / bi-fold pocket |
| Letter | Equal tri-fold | ~3.67 × 8.5 in | Custom ~3.8–4.0 in pocket, or accept a looser 4 × 9 in rack |
Unequal folds (Z-fold with a short cover, gate-fold, map-fold) do not match these panels. Measure the thickest finished edge after folding and lamination. That measurement, not the file’s trim box, should drive the pocket width.
Holder pocket versus printed sheet
A literature pocket is a tray, not a sleeve cut to the exact trim size. Paper varies with humidity. Laminate and UV coating add thickness. People grab copies at an angle. If the pocket matches the sheet exactly, the last few copies become hard to remove and the stack scuffs the acrylic edge.
- Width: add about 2–3 mm (roughly 1/8 in) to the finished insert width.
- Height / reveal: leave enough of the brochure visible to read a title; many counter pockets expose 20–40 mm of the top panel. That is a design choice, not a paper standard.
- Depth / capacity: set by how many copies you want to load, paper weight (e.g. 150–250 gsm cover stock behaves differently from 80–100 gsm text), and whether the pocket is open-front or enclosed.
- Orientation: portrait is the default for DL, A5, and Letter takeaways. Landscape Letter and A4 are common for menus and sign-style inserts that are read, not taken.
Acrylic thickness for the holder itself is a separate decision from paper size. Thin sheet is common on small countertop single pockets. Wider multi-pocket wall units usually need a stiffer back panel so the row does not bow when fully loaded. Choose thickness from span and load, not from the paper format name.
How to choose a size for the job
Reception and hotel lobby
Guests pick up one leaflet and leave. DL or 4 × 9 in rack cards in a single- or three-pocket counter unit keep the desk clear. Add one A4 or Letter holder only if you also display a full-page map or rate sheet that should not be folded.
Retail and clinic waiting rooms
A5 or half-letter booklets sit more stably than tall DL cards when children or bags bump the stand. Wall-mounted multi-pocket units work when floor space is limited; confirm the heaviest catalog weight before choosing pocket count.
Trade shows
Staff restock under time pressure. Slightly generous pockets (the 2–3 mm clearance above) matter more than a flush look. If you serve both EU and US visitors, do not mix A4-unfolded and Letter-unfolded in the same row; the extra 6 mm of Letter width is visible and will look like a fit error.
Restaurants and cafés
Table pieces are often A5, 5 × 7 in, or half-letter and behave more like sign inserts than brochures. If the sheet is not meant to be taken, a sign holder with a top or side load is more stable than an open literature pocket.
When not to use a “standard”
Square lookbooks, die-cut shapes, stitched catalogs thicker than a simple fold, and oversized real-estate folders need a measured sample. Send the physical piece, or at least the finished width × height × stack thickness, rather than only a paper-size name.
What to put on a fabrication drawing
A size name is not a specification. A drawing that a factory can build from usually includes:
- Insert width × height in mm and inches, after folding and finishing
- Whether the insert is taken (open pocket) or only displayed (sign holder)
- Portrait or landscape, single- or double-sided viewing
- Pocket count and whether pockets are stacked or side by side
- Desired stack capacity or a sample of the paper
- Mounting: countertop, wall, slatwall, cable, or floor stand
- Edge finish and whether the top lip is polished, bent, or left as a laser edge
General acrylic fabrication knowledge applies here the same way it does to any bent or bonded sheet part: call out bend radii, hole positions, and which face is the show face. Company process and catalog options live on the manufacturer’s own pages; they are not a substitute for the dimensions above. Product examples of literature and sign holders are listed on skacrylic.com if you need a starting format rather than a blank sheet.
FAQ
Is A4 the same as US Letter?
No. A4 is 210 × 297 mm. Letter is 8.5 × 11 in (216 × 279 mm). Letter is about 6 mm wider and 18 mm shorter. Holders are not interchangeable if the fit is meant to look tight.
Is DL the same as a 4 × 9 inch rack card?
No. ISO DL is 99 × 210 mm. A common US rack card is 4 × 9 in (102 × 229 mm). Use the larger of the two, plus clearance, if one pocket must accept both.
What size should I choose if I only print one brochure?
For international distribution, A4 tri-fold (DL panel) is the most widely recognized takeaway. For US-only print, Letter tri-fold or a 4 × 9 in rack card matches the racks already in hotels and visitor centers.
Should the holder be sized to the flat file or the folded piece?
Size it to the folded, finished piece that a visitor will pull out, including laminate. The flat file size only matters if the brochure is displayed unfolded.
How much extra width should the pocket have?
About 2–3 mm beyond the finished insert is a practical starting point for paper leaflets. Thicker stitched catalogs may need more opening width and a deeper tray, which should be checked with a physical dummy.
Can one multi-pocket unit mix A4 and DL?
Yes, if the pockets are different widths. Do not put both formats in identical pockets. The empty space around a DL card in an A4 pocket looks unfinished and lets the stack slump.
Does acrylic grade change the paper size I should use?
No. Paper size is independent of whether the holder is made from cast or extruded acrylic. Material grade affects machining, edge quality, and outdoor aging of the holder, not the ISO or ANSI sheet size.
Sources
Paper dimensions below are taken from public standards, not from vendor catalogs. Holder clearance figures are shop practice for removable literature, not a clause in those standards.
- ISO 216:2007 — Writing paper and certain classes of printed matter — Trimmed sizes — A and B series
- ISO 269 — Correspondence envelopes — Designation and sizes (DL)
- NIST — SI units: length (inch–millimetre conversion)
- Complementary reading: national mapping of A-series into office practice is documented alongside ISO 216 rather than in retailer size charts