As a rule we use two different formats for pictures.
1. MatrixThese images is 154 pxl width and 86 pxl high. All these images should be placed under "teaser" for the article. And the size should be set before importing the image to the Wip
2. Product picturesThese images is 112 pxl width, but the height varies. When you import a product image, make sure that the image is more than 112 pxl wide before you import it to the image folder in the Wip. You don't need the exact size or composition before importing the image.
3. EmployeesImages of employees are 112 pxl width and 112 pxl height.
4. BannersThere are two different banners. The large banner on the front page is 637 pxl width and 228 pxl height. The small banner on the front page (which is also visible on lover level pages) is 274 pxl width and 102 pxl height.