posted this on January 13, 2012 09:25 AM
Depending on the image and how it was created, we offer content in JPG format as well as vector illustrations in AI and EPS format. Each image detail page will tell you what is available, the dimensions in pixels or inches, and whether it's best sized for print or web. (Pssst! Web can use smaller 72 dpi images.)
Sizing is as follows:
Small - up to 1000px on the largest side
Medium - up to 2400px on the largest side
Large - up to 3800px on the largest side
Extra Large - the largest size available.
All Bigstock images can be resized using common image editing programs such as Adobe Photoshop or Adobe Illustrator (for vector illustrations). When in doubt, the largest size will offer you the most flexibility.
JPG files can be reduced, but lose sharpness when made larger.
Vectors can be made larger or smaller without losing sharpness or quality.