Free tool
Paper sizes in millimetres and inches
Short answer
A4 is 210 × 297 mm (8.27 × 11.69 in); US Letter is 215.9 × 279.4 mm (8.5 × 11 in). Each A size is half of the one before it: A3 is two A4s, A5 is half an A4. B sizes sit between A sizes, C sizes are the envelopes that fit them (a C4 envelope holds an unfolded A4).
ISO A (ISO 216)
Sizemminches
A0841 × 1,18933.11 × 46.81
A1594 × 84123.39 × 33.11
A2420 × 59416.54 × 23.39
A3297 × 42011.69 × 16.54
A4210 × 2978.27 × 11.69
A5148 × 2105.83 × 8.27
A6105 × 1484.13 × 5.83
A774 × 1052.91 × 4.13
A852 × 742.05 × 2.91
ISO B (ISO 216)
Sizemminches
B01,000 × 1,41439.37 × 55.67
B1707 × 1,00027.83 × 39.37
B2500 × 70719.69 × 27.83
B3353 × 50013.9 × 19.69
B4250 × 3539.84 × 13.9
B5176 × 2506.93 × 9.84
B6125 × 1764.92 × 6.93
Envelopes (ISO 269)
Sizemminches
C4229 × 3249.02 × 12.76
C5162 × 2296.38 × 9.02
C6114 × 1624.49 × 6.38
DL110 × 2204.33 × 8.66
United States and Canada
Sizemminches
Letter215.9 × 279.48.5 × 11
Legal215.9 × 355.68.5 × 14
Tabloid / Ledger279.4 × 431.811 × 17
Half Letter139.7 × 215.95.5 × 8.5
Offset sheets in Vietnamese print shops
Sizemminches
65 × 86 cm650 × 86025.59 × 33.86
79 × 109 cm790 × 1,09031.1 × 42.91
Questions
What size is A4 in inches?
8.27 × 11.69 inches (210 × 297 mm).
Is A4 the same as Letter?
No: Letter is 6 mm wider and 18 mm shorter (215.9 × 279.4 mm). Files made for one print with white edges or cropping on the other.
Which sheet sizes do Vietnamese print shops run?
The common offset sheets are 65 × 86 cm and 79 × 109 cm. A packaging layout is planned to fit as many pieces as possible on one of them.