This is a jpeg image

This is a gif image 4 colours with dither

This is a gif image 4 colours no dither

This is a gif image 2 colours 200 x 100

This is a gif image 2 colours 400 x 50

This is a gif image 2 colours 200 x 100 with a border of 2

Gif 100 x 100 aligned top Gif 100 x 100 h & v space =40aligned top

Space can be made with single pixel transparent images