Choosing the Correct Paper Size

We make it easy to find the correct paper size in American sizes or converted to Millimeters.

Paper Size Background Locations

 

A4 paper is the standard paper size used worldwide, with the exception of countries in North America. The US, Canada, and Mexico have standardized 8.5 inch by 11 inch (about 21.5 cm by 27.9 cm) paper, typically referred to as "letter" size. A4 paper is slightly longer, at about 8.27 inches by 11.75 inches (21 cm by 29.7 cm). This and other types of "A" paper sizes are based on a metric measurement system and established through international European standards.

 

American Paper Sizes

 

American Paper Sizes
Size Width x Height (mm) Width x Height (in) Aspect Ratio
Half Letter 140 x 216 mm 5.5 x 8.5 in 01:01.5
Letter 216 x 279 mm 8.5 x 11.0 in 01:01.3
Legal 216 x 356 mm 8.5 x 14.0 in 01:01.6
Junior Legal 127 x 203 mm 5.0 x 8.0 in 01:01.6
Ledger / Tabloid 279 x 432 mm 11.0 x 17.0 in 01:01.5

 

  4A0 to A10 Paper Sizes

 

Paper Sizes From 4A0 to A10 
Size Width x Height (mm) Width x Height (in)
4A0 1682 x 2378 mm 66.2 x 93.6 in
2A0 1189 x 1682 mm 46.8 x 66.2 in
A0 841 x 1189 mm 33.1 x 46.8 in
A1 594 x 841 mm 23.4 x 33.1 in
A2 420 x 594 mm 16.5 x 23.4 in
A3 297 x 420 mm 11.7 x 16.5 in
A4 210 x 297 mm 8.3 x 11.7 in
A5 148 x 210 mm 5.8 x 8.3 in
A6 105 x 148 mm 4.1 x 5.8 in
A7 74 x 105 mm 2.9 x 4.1 in
A8 52 x 74 mm 2.0 x 2.9 in
A9 37 x 52 mm 1.5 x 2.0 in
A10 26 x 37 mm 1.0 x 1.5 in

 

 

A Series Paper Chart

 

 

 

B Series Paper Chart

 

 

 

Paper Sheets Size Comparison

 

 

 

Some of the most commonly asked questions about paper sizes are asked about those paper sizes that are, or were, most often used in the office environment. These are the A4 paper size used internationally, Letter and Legal paper sizes in the US and the old imperial foolscap paper size that was used in the British Commonwealth prior to the introduction of the ISO 216 standard.

 

Letter at 279mm (11.0") is slightly smaller than A4 at 297mm (11.7"), both Legal at 356mm (14.0") and Foolscap at 330mm (13.0") are longer than A4 with Legal being the longest. Foolscap is the narrowest at 203mm (8.0"), followed by A4 at 210mm (8.3") and then Letter and Legal at 216mm (8.5").

 

The following comparison table gives the sizes in millimeters and inches of A4, Letter, Legal and Foolscap Folio paper together with the areas and aspect ratios for these types of paper.

 

SizeWidth x Height (mm)Width x Height (in)Area sq mArea sq ydAspect Ratio
A4 210 x 297 mm 8.3 x 11.7 in 0.062 sq m 0.074 sq yd 1:1.4142
Letter 216 x 279 mm 8.5 x 11.0 in 0.060 sq m 0.072 sq yd 1:1.2941
Legal 216 x 356 mm 8.5 x 14.0 in 0.077 sq m 0.092 sq yd 1:1.6471
Foolscap 203 x 330 mm 8.0 x 13.0 in 0.067 sq m 0.080 sq yd 1:1.625