ISO 217 · Commercial printing worldwide · 19 sizes
RA & SRA untrimmed sheets
RA and SRA are untrimmed press sheets from ISO 217 (1995). RA0 is 860 × 1220 mm and SRA0 is 900 × 1280 mm, both a little larger than A0, so a job can be printed with bleed and crop marks and then cut down to a finished A size.
From A4U (240 × 330 mm) to RA0 (860 × 1,220 mm).
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Every size in the series
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| Size | Width × Height (mm) | Centimetres | Inches | Points | Pixels @300 dpi | Ratio |
|---|---|---|---|---|---|---|
| RA0 | 860 × 1,220 mm | 86 × 122 cm | 33.86 × 48.03 in | 2,438 × 3,458 pt | 10,157 × 14,409 px | 1:√2 |
| RA1 | 610 × 860 mm | 61 × 86 cm | 24.02 × 33.86 in | 1,729 × 2,438 pt | 7,205 × 10,157 px | 1:√2 |
| RA2 | 430 × 610 mm | 43 × 61 cm | 16.93 × 24.02 in | 1,219 × 1,729 pt | 5,079 × 7,205 px | 1:√2 |
| RA3 | 305 × 430 mm | 30.5 × 43 cm | 12.01 × 16.93 in | 865 × 1,219 pt | 3,602 × 5,079 px | 1:√2 |
| RA4 | 215 × 305 mm | 21.5 × 30.5 cm | 8.46 × 12.01 in | 609 × 865 pt | 2,539 × 3,602 px | 1:√2 |
| SRA0 | 900 × 1,280 mm | 90 × 128 cm | 35.43 × 50.39 in | 2,551 × 3,628 pt | 10,630 × 15,118 px | 1:√2 |
| SRA1 | 640 × 900 mm | 64 × 90 cm | 25.2 × 35.43 in | 1,814 × 2,551 pt | 7,559 × 10,630 px | 1:√2 |
| SRA1+ | 660 × 920 mm | 66 × 92 cm | 25.98 × 36.22 in | 1,871 × 2,608 pt | 7,795 × 10,866 px | 5:7 |
| SRA2 | 450 × 640 mm | 45 × 64 cm | 17.72 × 25.2 in | 1,276 × 1,814 pt | 5,315 × 7,559 px | 1:√2 |
| SRA2+ | 480 × 650 mm | 48 × 65 cm | 18.9 × 25.59 in | 1,361 × 1,843 pt | 5,669 × 7,677 px | 1:1.35 |
| SRA3 | 320 × 450 mm | 32 × 45 cm | 12.6 × 17.72 in | 907 × 1,276 pt | 3,780 × 5,315 px | 1:√2 |
| SRA3+ | 320 × 460 mm | 32 × 46 cm | 12.6 × 18.11 in | 907 × 1,304 pt | 3,780 × 5,433 px | 1:1.44 |
| SRA3++ | 320 × 464 mm | 32 × 46.4 cm | 12.6 × 18.27 in | 907 × 1,315 pt | 3,780 × 5,480 px | 1:1.45 |
| SRA4 | 225 × 320 mm | 22.5 × 32 cm | 8.86 × 12.6 in | 638 × 907 pt | 2,657 × 3,780 px | 1:√2 |
| A0U | 880 × 1,230 mm | 88 × 123 cm | 34.65 × 48.43 in | 2,495 × 3,487 pt | 10,394 × 14,528 px | 5:7 |
| A1U | 625 × 880 mm | 62.5 × 88 cm | 24.61 × 34.65 in | 1,772 × 2,495 pt | 7,382 × 10,394 px | 1:√2 |
| A2U | 450 × 625 mm | 45 × 62.5 cm | 17.72 × 24.61 in | 1,276 × 1,772 pt | 5,315 × 7,382 px | 5:7 |
| A3U | 330 × 450 mm | 33 × 45 cm | 12.99 × 17.72 in | 935 × 1,276 pt | 3,898 × 5,315 px | 1:1.36 |
| A4U | 240 × 330 mm | 24 × 33 cm | 9.45 × 12.99 in | 680 × 935 pt | 2,835 × 3,898 px | 1:1.38 |
Have a measurement instead of a name? Paste it into the paper size finder — it reads 210 x 297, 8.5 x 11 in or 24x36 and names the sheet.
About this series
Commercial printers rarely print on finished A sizes. They print on oversize sheets, then guillotine the edges away to leave clean A-size pages with ink running right to the edge. ISO 217 defines those sheets as RA (raw format A) and SRA (supplementary raw format A).
RA0 has an area of about 1.05 m² at 860 × 1220 mm. SRA0 is about 1.15 m² at 900 × 1280 mm. Both halve like the A series: RA4 is 215 × 305 mm and SRA4 is 225 × 320 mm, against A4 at 210 × 297 mm. The RA series gives roughly 5 mm of extra margin, enough for crop marks; SRA gives roughly 15 mm, enough for crop marks, bleed and a printing-press gripper edge.
SRA3 (320 × 450 mm, 12.6 × 17.72 in) is the size that matters most. It is the standard sheet for digital presses and takes one A3 page or two A4 pages side by side, each with 3 mm bleed. SRA3+ (320 × 460 mm) and SRA3++ (320 × 464 mm) exist for presses that need a longer gripper margin. SRA2 (450 × 640 mm) and SRA1 (640 × 900 mm) are the litho equivalents.
Japan uses its own untrimmed sheets, defined in JIS P 0202 as A0U to A4U; A4U is 240 × 330 mm and gives even more room than SRA4. In North America the equivalent idea is printing Letter on 12 × 18 in or 13 × 19 in stock.
A practical tip: when you ask for a quote, say how the job imposes on the sheet, for example two-up A4 with bleed on SRA3. Printers price by the sheet, so a layout that fits SRA3 costs less than one that forces them onto SRA2.
Questions about this series
What is SRA3 paper size?
SRA3 is 320 × 450 mm (12.6 × 17.72 in). It is larger than A3 (297 × 420 mm) so that an A3 page, or two A4 pages, can be printed with bleed and crop marks and trimmed to size.
What is the difference between RA and SRA?
Both are untrimmed sheets. RA is about 5 percent larger than the A size by area (RA4 215 × 305 mm). SRA is about 15 percent larger (SRA4 225 × 320 mm) and leaves room for bleed, crop marks and the press gripper.
How many A4 pages fit on SRA3?
Two. SRA3 is 320 × 450 mm; two A4 pages side by side need 297 mm across and 420 mm down, which leaves room for 3 mm bleed on every edge plus crop marks.
What is RA4 used for?
RA4 (215 × 305 mm) is an oversize A4 for printing with crop marks but no bleed. It also appears in some inkjet and photo-printer trays. After trimming to 210 × 297 mm, the finished sheet is a normal A4.