Create new image size
To add an image size go to Administration -> Assets -> Image Sizes. The following view will be presented:
1. Click Create New Image Size. The following view will be presented:
2. Edit/configure:
Name
Enter an appropriate name for the size.
Width
Enter an appropriate value.
Height
Enter an appropriate value.
Crop
If required check to crop the iamge to the dimension rather than resizing..
Share Globally?
Check if required.
3. Click Save.