Aspect Ratios Explained

The ratio between a screens' height & width is known as its' "aspect ratio". It is important to have the correct aspect ratio or the image will either be "cropped", with parts cut off or you will be left with a "letter box" image with a black area at the top & bottom of the screen.

35mm Slide Format 3:2 (1:1.5) Aspect Ratio
PowerPointŪ has rendered this format obsolete
Imperial Size (feet & inches)
Metric Size (mm)
2' 8" x 4' 812mm x 1219mm
3' 4" x 5' 1016mm x 1524mm
4' x 6' 1219mm x 1829mm
4' 8" x 7' 1422mm x 2134mm
5' 4" x 8' 1625mm x 2438mm
6' x 9' 1829mm x 2743mm
6' 8" x 10' 2032mm x 3048mm
8"x 12" 2438mm x 3658mm