Envelope Sizes

Paper Sizes

United States Paper Sizes in Inches

Name	Size
Executive	7.5 x 10
A (letter)	8 1/2 x 11
Legal	8.5 x 14
B (ledger)	11 x 17
Super A3/B	13 x 19
C	17 x 22
D	22 x 34
E	34 x 44
F	28 x 40
G	11 x (22 1/2 to 90)
H	28 x (44 to 143)
H	28 x (44 to 143)
J	34 x (55 to 176)
K	40 x (55 to 143)

Metric Trimmed Paper Sizes

Metric Name	Metric Size in mm	Size in Inches	Closest United States Size	Size in Inches
A8	53 x 74	2.07 x 2.91	Business card	2 x 3 1/2
A7	74 x 105	2.91 x 4.13	3 x 5	3 x 5
A6	105 x 148	4.13 x 5.83	Microfiche	4.13 x 5.83
A5	148 x 210	5.83 x 8.27	5 x 8	5 x 8
A4	210 x 297	8.27 x 11.69	A	8 1/2 x 11
A3	297 x 420	11.69 x 16.54	B	11 x 17
A2	420 x 594	16.54 x 23.39	C	17 x 22
A1	594 x 841	23.39 x 33.11	D	22 x 34
A0	841 x 1189	33.11 x 46.81	E	34 x 44
2A	1189 x 1681	46.81 x 66.22

Metric Paper Sizes
The basic size of metric paper is one square meter, which is the area of an A0 sheet of metric paper. This size, taken along with the aspect ratio, fully determines the size and shape of metric reprographics paper.
For a given sheet size, United States paper is a little wider than metric paper in the short dimension, and a little shorter than metric paper in the long dimension.
As can be seen, A0 size folded once is A1 size, folded twice is A2 size, folded thrice is A3 size, and folded 4 times is A4 size.
Metric paper also has a B series of sizes for posters and wallcharts and a C series of sizes for envelopes.

Common North American Envelopes Short dimension precedes long dimension; Inch measurements are the finished envelope size; Metric measurements are approximate (calculated at 1 inch = 25.4 mm and rounded off). N.B. Except where noted, the envelope opening/flap is on the long dimension; Sizes identified as nonstandard do not conform to Universal Postal Union requirements for correspondence envelopes.

Name	No.	Inches	MM	Usage and Comments
Com- mercial	5	3 1/16 x 5 1/2	78 x 140	For correspondence; Nos. 5, 6, and 6 1/4 are nonstandard
	6	3 3/8 x 6	86 x 152
	6 1/4	3 1/2 x 6	89 x 152
	6 1/2	3 9/16 x 6 1/2	90 x 165
	6 3/4	3 5/8 x 6 1/2	92 x 165

Official	7	3 3/4 x 6 3/4	95 x 171	For correspondence; Nos. Data Card, 10, 10 1/2, 11, 12, and 14 are nonstandard
	7 1/2	3 3/4 x 7 5/8	95 x 194
	7 3/4 (Monarch)	3 7/8 x 7 1/2	98 x 190
	Data Card	3 1/2 x 7 5/8	89 x 194
	8 5/8 (Check)	3 5/8 x 8 5/8	92 x 219
	9	3 7/8 x 8 7/8	98 x 225
	10	4 1/8 x 9 1/2	105 x 241
	10 1/2	4 1/2 x 9 1/2	114 x 241
	11	4 1/2 x 10 3/8	114 x 264
	12	4 3/4 x 11	121 x 279
	14	5 x 11 1/2	127 x 292

Window	6 1/4	3 1/2 x 6	89 x 152	For invoices, statements, etc.; die-cut glassine-backed window permits name and address on enclosure to show; Standard window is 4 3/4" wide x 1 1/8" (121 mm x 29 mm); Window position is 7/8" (22 mm) from left edge, 5/8" (16 mm) from bottom (for No. 8 5/8, position is 5/8" [16 mm] from left edge, 13/16" [21 mm] from bottom); Nos. 6 1/4, 10, 11, 12, and 14 are nonstandard
	6 3/4	3 5/8 x 6 1/2	92 x 165
	7	3 3/4 x 6 3/4	95 x 171
	7 3/4	3 7/8 x 7 1/2	98 x 190
	8 5/8	3 5/8 x 8 5/8	92 x 219
	9	3 7/8 x 8 7/8	98 x 225
	10	4 1/8 x 9 1/2	105 x 241
	11	4 1/2 x 10 3/8	114 x 264
	12	4 3/4 x 11	121 x 279
	14	5 x 11 1/2	127 x 292

Remit- tance	6 1/4	3 1/2 x 6	89 x 152	Extradeep flap (between 3 3/8" [86 mm] and 3 1/2" [89 mm]) can carry printed message; Nos. 6 1/4 and 6 1/2 are nonstandard
	6 1/2	3 1/2 x 6 1/4	89 x 159
	6 3/4	3 5/8 x 6 1/2	92 x 165
	9	3 7/8 x 8 7/8	98 x 225

Banker's Flap & Wallet Flap	10	4 1/8 x 9 1/2	105 x 241	For bulky correspondence; Heavy- weight paper and deep pointed flap (banker's) or squared flap (wallet); All sizes are nonstandard
	11	4 1/2 x 10 3/8	114 x 264
	12	4 3/4 x 11	121 x 279
	14	5 x 11 1/2	127 x 292
	16	6 x 12	152 x 305

Announce- ment Text	A-2	4 3/8 x 5 3/4	111 x 146	Made with matching text paper; Flap often has deckle edge; Basically square in shape, hence all sizes except Slim are nonstandard
	A-6	4 3/4 x 6 1/2	121 x 165
	A-7	5 1/4 x 7 1/4	133 x 184
	A-8	5 1/2 x 8 1/8	140 x 206
	A-10	6 x 9 1/2	152 x 241
	Slim	3 7/8 x 8 7/8	98 x 225

Baronial	2	3 3/16 x 4 1/4	81 x 108	For formal correspondence, invitations, announcements, greeting cards; Deep pointed flap; Because of broad variety in sizes, availability should be con- firmed with manufacturer/supplier; Basically square in shape, hence all sizes are nonstandard
	4	3 5/8 x 4 5/8	92 x 117
	5	4 1/8 x 5 1/8	105 x 130
	5 1/4	4 1/4 x 5 1/4	108 x 133
	5 1/2	4 3/8 x 5 5/8	111 x 143
	6	5 x 6 1/4	127 x 159

Booklet or Open Side	2 1/2	4 1/2 x 5 7/8	114 x 149	For booklets, folders, direct mail; Basically square in shape, hence all sizes are nonstandard
	3	4 3/4 x 6 1/2	121 x 165
	4 1/4	5 x 7 1/2	127 x 190
	4 1/2	5 1/2 x 7 1/2	140 x 190
	5	5 1/2 x 8 1/2	140 x 216
	6	5 3/4 x 8 7/8	146 x 225
	6 1/2	6 x 9	152 x 229
	6 3/4	6 1/2 x 9 1/2	165 x 241
	7	6 1/4 x 9 5/8	159 x 244
	7 1/4	7 x 10	178 x 254
	7 1/2	7 1/2 x 10 1/2	190 x 267
	8	8 x 11 1/8	203 x 283
	9	8 3/4 x 11 1/2	222 x 292
	9 1/2	9 x 12	229 x 305
	10	9 1/2 x 12 5/8	241 x 321
	13	10 x 13	254 x 330

Catalogue or Open End	1	6 x 9	152 x 229	For catalogues, booklets, magazines, reports; Opening/flap on short dimension; All sizes are nonstandard
	1 3/4	6 1/2 x 9 1/2	165 x 241
	2	6 1/2 x 10	165 x 254
	3	7 x 10	178 x 254
	6	7 1/2 x 10 1/2	190 x 267
	7	8 x 11	203 x 279
	8	8 1/4 x 11 1/4	210 x 286
	9 1/2	8 1/2 x 10 1/2	216 x 267
	9 3/4	8 3/4 x 11 1/4	222 x 286
	10 1/2	9 x 12	229 x 305
	12 1/2	9 1/2 x 12 1/2	241 x 317
	13 1/2	10 x 13	254 x 330
	14 1/4	11 1/4 x 14 1/4	286 x 362
	14 1/2	11 1/2 x 14 1/2	292 x 368

Metal Clasp & String-and- Button	0	2 1/2 x 4 1/4	63 x 108	For mailing bulky papers; Heavy- weight paper; Opening/flap on short dimension; All sizes except Nos. 15, 25, and 35 are nonstandard
	5	3 1/8 x 5 1/2	79 x 140
	10	3 3/8 x 6	86 x 152
	11	4 1/2 x 10 3/8	114 x 264
	14	5 x 11 1/2	127 x 292
	15	4 x 6 3/8	102 x 162
	25	4 5/8 x 6 3/4	117 x 171
	35	5 x 7 1/2	127 x 190
	50	5 1/2 x 8 1/4	140 x 210
	55	6 x 9	152 x 229
	63	6 1/2 x 9 1/2	165 x 241
	68	7 x 10	178 x 254
	75	7 1/2 x 10	190 x 254
	80	8 x 11	203 x 279
	83	8 1/2 x 11 1/2	216 x 292
	87	8 3/4 x 11 1/4	222 x 286
	90	9 x 12	229 x 305
	93	9 1/2 x 12 1/2	241 x 317
	94	9 1/4 x 14 1/2	235 x 368
	95	10 x 12	254 x 305
	97	10 x 13	254 x 330
	98	10 x 15	254 x 381
	105	11 1/2 x 14 1/2	292 x 368
	110	12 x 15 1/2	305 x 394

ISO C Series Envelopes This envelope series was designed to accommodate ISO A size papers; Metric measurements are the finished envelope size; Inch measurements are approximate (calculated at 25.4 mm = 1 inch and rounded off). N.B. Sizes identified as nonstandard do not conform to Universal Postal Union requirements for correspondence envelopes.

Name	MM	Inches	Usage and Comments
C0	917 x 1297	36 1/8 x 51 1/16	For flat A0 sheet; Nonstandard
C1	648 x 917	25 1/2 x 36 1/8	For flat A1 sheet; Nonstandard
C2	458 x 648	18 x 25 1/2	For flat A2 sheet, A1 sheet folded in half; Nonstandard
C3	324 x 458	12 3/4 x 18	For flat A3 sheet, A2 sheet folded in half; Nonstandard
C4	229 x 324	9 x 12 3/4	For flat A4 sheet, A3 sheet folded in half; Very common; Nonstandard
C5	162 x 229	6 3/8 x 9	For flat A5 sheet, A4 sheet folded in half; Very common; Nonstandard
C6	114 x 162	4 1/2 x 6 3/8	For A5 sheet folded in half, A4 sheet folded in quarters; Very common
C7/6	81 x 162	3 3/16 x 6 3/8	For A5 sheet folded in thirds; Uncommon; Nonstandard
C7	81 x 114	3 3/16 x 4 1/2	For A5 sheet folded in quarters; Uncommon; Nonstandard
DL*	110 x 220	4 5/16 x 8 11/16	For A4 sheet folded in thirds, A5 sheet folded in half lengthwise; Very common
* Although DL is not part of the ISO C series, it is a very widely used standard size. DL is the abbreviation of DIN Lang (Deutsche Industrie Norm, Long).