Standard Poster Sizes and Ratios

Mnemonic crib sheet for poster dimensions and ratios.

I have researched this topic a few times over the years. The information I wanted always seemed to be scattered around on different resources. So I've decided to consolidate all the specifications and compile this crib sheet for future reference.

I'm interested in all the different poster size standards, and the ratios and dimensions (both absolute and relative) associated with each.

The five sizes of interest from smallest to largest are: Tabloid (aka Ledger or ANSI B), Architectural C, Architectural D, One Sheet and Bus Stop.

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Tabloid (a.k.a. Ledger or ANSI B)

  • Ratio (w:h): 0.6471
  • Absolute Dimensions: 11 x 17 inches / 279 x 432 mm
  • At 72 PPI: 792 x 1224 pixels
  • At 150 PPI: 1650 x 2550 pixels
  • At 300 PPI: 3300 x 5100 pixels

Architectural C

  • Ratio (w:h): 0.75
  • Absolute Dimensions: 18 x 24 inches / 457 x 610 mm
  • At 72 PPI: 1296 x 1728 pixels
  • At 150 PPI: 2700 x 3600 pixels
  • At 300 PPI: 5400 x 7200 pixels

Architectural D

  • Ratio (w:h): 0.6667
  • Absolute Dimensions: 24 x 36 inches / 610 x 914 mm
  • At 72 PPI: 1728 x 2592 pixels
  • At 150 PPI: 3600 x 5400 pixels
  • At 300 PPI: 7200 x 10800 pixels

One Sheet

  • Ratio (w:h): 0.675
  • Absolute Dimensions: 27 x 40 inches / 686 x 1016 mm
  • At 72 PPI: 1944 x 2880 pixels
  • At 150 PPI: 4050 x 6000 pixels
  • At 300 PPI: 8100 x 12000 pixels

Bus Stop

  • Ratio (w:h): 0.6667
  • Absolute Dimensions: 40 x 60 inches / 1016 x 1524 mm
  • At 72 PPI: 2880 x 4320 pixels
  • At 150 PPI: 6000 x 9000 pixels
  • At 300 PPI: 12000 x 18000 pixels

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