|
In an effort to standardize paper/envelope sizes, the International
Standards Organization (ISO) has developed a system that has
been adopted by many metric-standardized countries. Although
available but not stocked, international-sized envelopes can
be converted by and are available from National EnvelopeCorporation.
The standard is based upon the principle that a rectangle's
sides have a ratio of 1:2. If you cut in half any sheet with
these proportions, it will always yield two new sheets with the
same proportions. There are three ISO series: A, B & C, and
each has a suffix which denotes the size. The lower the number,
the larger the size. The smallest size in each series is A10,
B10 or C10.
ISO Paper Chart
|
|
ISO Envelope/Paper configurations
|
A Series -- General Print
Used for the majority of printed material -- stationery, business
cards, leaflets, brochures, mailers and manuals.
|
Metric
(mm) |
Approximate
Inches |
| A0 |
841
x 1189 (area =1m2) |
33 1/8
x 46 3/4 |
| A1 |
594
x 841 |
23 3/8
x 33 1/8 |
| A2 |
420
x 594 |
16 1/2
x 23 3/8 |
| A3 |
297
x 420 |
11 3/4
x 16 1/2 |
| A4 |
210
x 297 |
8 1/4
x 11 3/4 |
| A5 |
148
x 210 |
5 7/8
x 8 1/4 |
| A6 |
105
x 148 |
4 1/8
x 5 7/8 |
| A7 |
74 x
105 |
2 7/8
x 4 1/8 |
| A8 |
52 x
74 |
2 x
2 7/8 |
| A9 |
37 x
52 |
1 1/2
x 2 |
| A10 |
26 x
37 |
1 x
1 1/2 |
|
|
B Series -- Posters & Wallcharts
An alternative
to the A series. Ideal for posters and wall-charts.
|
Metric
(mm) |
Approximate
Inches |
| B0 |
1,000
x 1414 |
39 3/8
x 55 5/8 |
| B1 |
707
x 1,000 |
27 7/8
x 39 3/8 |
| B2 |
500
x 707 |
19 5/8
x 27 7/8 |
| B3 |
353
x 500 |
13 7/8
x 19 5/8 |
| B4 |
250
x 353 |
9 7/8
x 13 7/8 |
| B5 |
176
x 250 |
7 x
9 7/8 |
| B6 |
125
x 176 |
5 x
7 |
| B7 |
88 x
125 |
3 1/2
x 5 |
| B8 |
62 x
88 |
2 1/2
x 3 1/2 |
| B9 |
44 x
62 |
1 3/4
x 2 1/2 |
| B10 |
31 x
44 |
1 1/4
x 1 3/4 |
|
|
C Series -- General Stationery
The C series comes
midway between the corresponding A & B series. It is ideal
for mailers, postcards and envelopes. For example, C4 envelopes
are designed to accommodate A4 letterheads or leaflets.
Size
DL envelopes 110 x 220 mm (4 1/3 x 8 2/3)
are used to accommodate A4 (81/4 x 113/4)
folding into thirds; see illustration on previous page.
|
Metric
(mm) |
Approximate
Inches |
| C0 |
917
x 1297 |
36 x
51 |
| C1 |
648
x 917 |
25 1/2
x 36 |
| C2 |
458
x 648 |
18 x
25 1/2 |
| C3 |
324
x 458 |
12 3/4
x 18 |
| C4 |
229
x 324 |
9 x
12 3/4 |
| C5 |
162
x 229 |
6 3/8
x 9 |
| C6 |
114
x 162 |
4 1/2
x 6 3/8 |
| C7 |
81 x
114 |
3 1/4
x 4 1/2 |
| C8 |
57 x
81 |
2 1/4
x 3 1/4 |
|
|
ISO Envelope Standards
Sheets from the
A series can be inserted in the C series envelope, flat or folded.
For example, a C5 envelope will accommodate an A5 sheet flat
or an A4 folded once. A listing of ISO envelope sizes follows.
All are taken from B or C size sheets.
Open
window envelopes are not allowed in many foreign countries. Consult
international postal regulations before specifying.
|
Metric
(mm) |
Approximate
Inches |
Nearest
size available |
| C3 |
324
x 458 |
12 3/4
x 18 |
N/A |
| B4 |
250
x 353 |
9 7/8
x 12 7/8 |
10 x
13 |
| C4 |
229
x 324 |
9 x
12 3/4 |
9 x
13 |
| B5 |
176
x 250 |
7 x
9 7/8 |
7 x
10 |
| C5 |
162
x 229 |
6 3/8
x 9 |
6 1/2
x 9 |
| B6/C4 |
125
x 324 |
5 x
12 3/4 |
N/A |
| B6 |
125
x 176 |
5 x
7 |
5x 7 |
| C6 |
114
x 162 |
4 1/2
x 6 3/8 |
4 1/2
x 6 3/8 |
| DL |
110
x 220 |
4 1/4
x 8 3/4 |
4 1/4
x 8 7/8 |
| C7/6 |
81 x
162 |
3 1/4
x 6 3/8 |
3 7/16
x 6 5/8 |
| C7 |
81 x
114 |
3 1/4
x 4 1/2 |
3 1/4
x 4 1/2 |
|
|
|
