Imaging and Color - The Graphic Design: Reference and Specification - page 20

s ta n da r d d i g i ta l i m ag e s i z e s f o r w e b
When considering images for online use, note that there are many variations. However,
there are several common standards. For example, if you make your images larger than
460 pixels, most standard blogs will not be able to fit this size into a standard post.
Below are several standard image sizes:
• Thumbnail: 150px in the long dimension, or smaller, for example 75 × 75px
• Small: 240px in the long dimension
• Medium: 460px in the long dimension
• Large: 520px in the long dimension
• Very large: 800px in the long dimension
Common best practices for using images around the Web: use a thumbnail linked to a
larger version; decrease the image resolution to 72dpi; use JPEG format for photos and
GIF format for text or line art.
s ta n da r d a d u n i t g u i d e l i n e s
To prepare images for use in advertising units, consult the Ad Unit Guidelines developed
by the IAB for standard sizes for banners, skyscrapers and buttons in various sizes.
Advertising units come in three categories: Skyscrapers and verticals; horizontals and
buttons; rectangles and squares.
Interactive Advertising Bureau (IAB)
116 East 27th Street, 7th Floor
New York, New York 10016
[phone]
www.iab.net