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Paper Sizes in CM MM Inches and Pixels

Jacob Hill - Saturday, February 05, 2011

I Get asked a lot about Paper Sizes...

So I thought what a better way of sitting down and publish a few pages on paper sizes. For the ISO Paper sizes between A0 and A4 are listed below in each link. You will find the measurements in Millimeters, Centimeters, Inches / Decimal, Inches / Fraction, Points, Picas and even pixels at 300, 150, 72 ppi as CMYL, RGB, Gray Scale and Bitmap.

Help it helps with finding the paper sizes you want.

 A0 paper size | A1 paper size | A2 paper size | A3 paper size | A4 paper size.

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conference call commented on 09-Feb-2011 08:07 PM
This has been a very significant blog indeed. I’ve acquired a lot of helpful information from your article. Thank you for sharing such relevant topic with us.

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Image Resolution for Printing Made Simple

Jacob Hill - Saturday, January 29, 2011
High resolution images are required for printing, but how high depends on the viewing distance.

But first you need to understand What DPI, PPI and LPI means. (If you know this Skip to resizing images)

DPI means Dots Per Inch (DPCM means Dots Per CM)
In application like Photoshop they use the term PPI or PPCM The First P just stands for Pixels.
DPI tends to get used more often than in PPI in conversations about size of photographs. But in general the following should be used.
DPI - Refers to Dots per inch on printers like inkjets or Imagesetters and DTP Systems.
PPI - Simply refers to Pixels per Inch for digital images and Monitors.
LPI - Which refers to the screening of traditional print like magazines. Often written as oftern 175# or refered to as "Screen Rulling"

This is an example of if you were taking an image to Digital Print, Photo Prints and Canvas Prints.
The Image is viewed at 72PPI on Screen - The image resolution should be set to at least 150PPI - The inkjet printer would be printing at least 2400 DPI  - (LPI is not used because no screen ruling is used).

This is an example of if you were taking an image to Traditional Litho Print.
The Image is viewed at 72PPI on Screen - The image resolution should be set to at least 300PPI - The imagesetter or CTP System will be set to at least 2400 DPI  - The screen ruling for the Images on the printing plate will be between 133# to 200# This is defined by the quality of the paper.

Resizing images

First of all you need to know what the  PPI needs to be for you printed product.

For Fine Art Prints and Magazine prints the PPI needs to be about 300 PPI (120 PPCM Aprox)
For Canvas and Photo Prints the PPI needs to be at least 150 PPI (60 PPCM Aprox)
For Large Posters that are being viewed from a few meters or more then you can go as low as 72 PPI (30PPCM Aprox)

Now if you own a copy of Photoshop then you can constrain the width hight and resolution to adjust your image to the correct resolution for print.

If you don't have photo shop but you know the pixel width and hight of the image then use the sum below
Example of an image that is 3000 x 2000 Pixels

(Please not that for PPCM has been rounded of to the nearest 10 to make the calculation simpler)

For Inches (example for canvas prints at 150 PPI)
x PIXELS ÷ y PPI = z Inches
3000 PIXELS ÷ 150 PPI = 20 Inches
2000 PIXELS ÷ 150 PPI = 13.33 Inches

For CM (example for canvas prints at 60PPCM)
x PIXELS ÷ y PPCM = z CM
3000 PIXELS ÷ 60 PPCM = 50 CM
2000 PIXELS ÷ 150 PPCM = 33.33 CM

If your image is two small then there is some software on the market that will grow your image better that Photoshop.
However when growing an image it does not work to well on jpg images that have lost quality due to being compressed to much.

If you are ordered a canvas print or photo print from us then we can grow your image for Free.
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Matthew commented on 29-Jan-2011 04:40 PM
Good info. It's also worth mentioning that when it comes to fine-art inkjet printing, the exact resolution at which you should print your photograph is actually dependent on the manufacturer of the printer... so, for example, 240ppi may be better than 300ppi in some cases because the printer won't have to interpolate the image to print at it's native dpi . So, always check the details of your printer model.

- Matthew Gore
melissa commented on 30-Jan-2011 05:37 PM
thanks for telling abt photo resolution for printing! learnt a lot from this post!
Sacramento commented on 31-Jan-2011 06:25 PM
I had no idea those were the conventions that people used when referring to photoshop and printed images. Is there a calculator somewhere to determine how much PPI you need to save your image at to print at a certain DPI and vice-versa?
Data Centers commented on 05-Feb-2011 06:58 AM
Printer that has a good dot per inch quality provides a better hard copy of any document. This is a good detailed article regarding printers. Thanks for sharing.
bathroom remodeling naperville commented on 14-Feb-2011 07:54 PM
Thank you! I'm a strictly recreational photographer and I have a long way to go before my stuff is near the level of quality where your tips are necessary, but they were useful to read.

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