4:3 is the ratio used by most cameras for their highest resolution images, but it is then often cropped to varying extents to fit popular sizes of prints and cards; and many of the images on the right can also be supplied in other versions, with a bigger range of size and format options than available in the 4 by 3 sizes.
The sizes available are:
|40 x 30||£35||£15|
|80 x 60||£80||£30|
|100 x 75||£110||£40|
but may increase if printing costs rise.
To get these designs as cards or mounted prints, check out the A4/A5/A6 images available in landscape or portrait formats, and also the 3 by 2 images.