Paper and envelope sizes confuse me! While I
know that US letter paper is 8.5 x 11”,
and US Legal paper is 8.5 x 14”, that is
only the start of the sizes that can appear in
a print dialog box.
Of course, just where to select a paper size in
a Macintosh application is also undergoing
changes. In TextEdit, paper size is selected in
File > Page Setup. The size choice will
look similar to this if you have not selected a
specific printer:
In Apple’s
Pages, while you will use the same command in
the File menu, the printer you are using will
cause changes in the Paper Size popup menu.

Even more confusing is
Address Book. There is no Page Setup item in the File
menu. Instead, you will need to select the type of
item you want to print in the Print Dialog box. Then,
your paper size choices will appear as a drop down
list. This box shows what is available when my Epson
Stylus Photo RX600 is selected.
The list looks entirely
different if I choose my Brother MFC7820N:
So, the paper selections
available are controlled by the printer driver, not
the application you are using.
While some programs list the size of the item in the
dialog box…
Applications that do not
have a Page Setup menu item (such as Address Book)
may leave you clueless about the item’s size.
I feel your pain! It
would be really nice to have a place that lists the
names and sizes of all these papers and envelopes! I
spent quite a few hours last week making an
exhaustive list to fill that need, and here it is! I
know that you can find even more. I did. But, I had
to stop somewhere!
Paper
US Letter  8.5 x 11.0”
US Legal  8.5 x 14.0”
Half Letter  5.5 x 8.5”
Executive  7.25 x10.5”
Government Legal  8.5 x 13.0”
Government Letter  8.0 x 10.5”
Broadsheet  18.0 x 24.0”
Ledger  11 x 17”
Tabloid  17 x 11”
Tabloid Extra  12 x 18 “
ROC 16K  7.75 x 10.75”
A (Letter)  8.5 x 11”
B (Legal)  8.5 x 14”
C  17 x 22”
D  22 x 34”
E  34 x 44”
F  28 x 40”
F4  8.27 x 13.0”
G  11 x (22 1/2 to 90)”
H  28 x (44 to 143)”
K  34 x (55 to 176)”
L  40 x (55 to 143)”
A0  33.1 x 46.8”
A1  23.4 x 33.1”
A2  16.5 x 23.4”
A3  11.7 x 16.5”
A4  8.3 x 11.7”
A5  5.8 x 8.3”
A6  4.1 x 5.8”
A7  2.9 x 4.1”
A8  2.1 x 2.9”
B5  6.93 x 9.85”
B6  4.9 x 6.9”
Super B/A3  13 x 19”
JB5  7.17 x 10.12”
Cards
Index Cards
3 x 5”
4 x 6”
5 x 8”
Business Cards
International Business Card 
2.125 x 3.37
US Business Card  2 x 3.5”
US Folded Business Card  3.5 x 4”
Japanese Business Card  2.165 x 3.583
Common Postcard Sizes
4 x 6"
5 x 7"
5 x 8"
6 x 9"
6 x 11”
Envelopes
#10 Envelope  4.12 x 9.50"
DL Envelope  4.33 x 8.67”
C5 Envelope  6.375 x 9”
Monarch Envelope  3.88 x 7.50”
Envelope #4  3.625” x 4.635”
Envelope MAX  7.25” x 13”
Chouekei 3 Envelope  4.72” x 9.25”
Baronial Envelopes
Professional  2.125 x 3.625"  use 2" x 3.5"
enclosure
#16 (Mrs.)  2.375 x 3.375"  use 2.25" x 3.125"
enclosure
#17 (Mr. & Mrs.)  2.6875 x 3.6875"  use 2.5625"
x 3.5625" enclosure
Baronial 2  3.1875 x 4.25"
Gladstone  3.563 x 5.562"  use 3.375" x 5.375"
enclosure
Baronial 4  3.625 x 4.625"
Baronial 5  4.125 x 5.125"
Baronial 5 1/4  4.25 x 5.25"
Baronial 5 1/2  4.375 x 5 .625"
Baronial 5 3/4  4.50 x 5.75"
6Bar/Walton Outside  4.75 x 6.5"  use 4.625" x
6.25" enclosure
Baronial 6  5 x 6"
Lee  5.25 x 7.25"  use 5.125" x 7" enclosure
Linwood/Monona Inside  5.25 x 7.5"  use 5" x 7.25"
enclosure
Monona Outside  5.5 x 7.75"  use 5.25 x 7.5"
enclosure
Commercial Envelopes
5  6.38 x 9.02”
6  4.50 x 6.4”
6 1/4  3.50 x 6”  use 3.25 x 5.75”
enclosure
6 1/2  6 x 3.3125”
6 3/4  3.625 x 6.5"  use 3.5 x 6.25" enclosure
7 3/4 (Monarch)  3.875 x 7.5"  use 3.75 x 7.25"
enclosure
8  3 7/8 x 7.50"
8 5/8  3.625 x 8.625"  use 3.5 x 8.375" enclosure
9  (Policy) 4 x 9"  use 3.75 x 8.5" enclosure
10  4.125 x 9.5"  use 4 x 9.25" enclosure
11  4.5 x 10.375"  use 4.25 x 10.125" enclosure
12  4.75 x 11"  use 4.5 x 10.75" enclosure
14  5 x 11.5"  use 4.75 x 11.25" enclosure
16  6 x 12"  use 5.75 x 11.75" enclosure
Announcement Envelopes
A2  4 3/8" x 5 3/4"  Use 4 1/4” x 5
1/2” enclosure
A6  4 3/4" x 6 1/2"  Use 4 1/4” x 6
1/4” enclosure
A7  5 1/4" x 7 1/4"  Use 5” x 7”
enclosure
A8  5 1/2" x 8 1/8"  Use 5 1/4’ x 7
3/4” enclosure
A9  5 3/4” x 8 3/4”  Use 5 1/2”
x 8 12” enclosure
A10  6" x 9 1/2"  Use 5 3/4” x 9 1/4”
enclosure
Slim  3 7/8" x 8 7/8"
Booklet Envelopes
3  4.75 x 6.5"  use 4.5 x 6" enclosure
4 1/2  5.5 x 7.5"  use 5.25 x 7" enclosure
5  5.5 x 8.125"  use 5.25 x 7.625" enclosure
6  5.75 x 8.875"  use 5.5 x 8.375" enclosure
6 1/2  6 x 9"  use 5.75 x 9" enclosure
6 5/8  6 x 9.5"  use 5.75 x 9" enclosure
6 3/4  6.5 x 9.5"  use 6.25 x 9" enclosure
7 1/4  7 x 10"  use 6.75 x 9.5" enclosure
7 1/2  7.5 x 10.5"  use 7.25 x 10" enclosure
9  8.75 x 11.5"  use 8.5 x 11" enclosure
9 1/2  9 x 12"  use 8.75 x 11.5" enclosure
10  9.5 x 12.625"  use 9.25 x 12.125" enclosure
13  10 x 13"  use 9.75 x 12.5" enclosure
Catalog Envelopes
1  6 x 9"  use 5.75 x 8.75" enclosure
1 3/4  6.5 x 9.5"  use 6.25 x 9.25" enclosure
2  6 1/2 x 10"
3  7 x 10"  use 6.75 x 9.5" enclosure
6  7.5 x 10.5"  use 7.25 x 10" enclosure
7  8 x 11"
8  8.25 x 11.25"  use 8 x 10.75" enclosure
9 1/2  8 1/2 x 10 1/2"
9 3/4  8.75 x 11.25"  use 8.5 x 10.75" enclosure
10 1/2  9 x 12"  use 8.75 x 11.5" enclosure
12 1/2  9.5 x 12.5"  use 9.25 x 12" enclosure
13 1/2  10 x 13"  use 9.75 x 12.5" enclosure
14 1/4  11.25 x 14 1/4"
14 1/2  11.5 x 14.5"  use 11.25 x 14" enclosure
15  10 x 15"  use 9.75 x 14.5" enclosure
15 1/2  12 x 15.5"  use 11.75 x 15" enclosure
Square Envelopes
5  5 x 5"  use 4.75 x
4.75" enclosure
5 ½  5.5 x 5.5"  use 5.25 x 5.25" enclosure
6  6 x 6"  use 5.75" x 5.75 enclosure
6 ½  6.5 x 6.5"  use 6.25 x 6.25" enclosure
7  7 x 7"  use 6.75 x 6.75" enclosure
7 ½  7.5 x 7.5"  use 7.25 x 7.25" enclosure
8  8 x 8"  use 7.75 x 7.75" enclosure
8 ½  8.5 x 8.5"  use 8.25 x 8.25" enclosure
9  9 x 9"  use 8.75 x 8.75" enclosure
9 ½  9.5 x 9.5"  use 9.25 x 9.25" enclosure
10  10 x 10"  use 9.75 x 9.75" enclosure
13 ½  13.5 x 13.5"  use 13.25 x 13.25" enclosure