How to chose the right machine needle

There are a vast array of needles to choose from, but those little needle packs don't come supplied with an awful lot of info!  Print out the graphic below and use it to choose the right needle everytime.

See also my guide on machine needles - Sewing machine needle know-how.

 

Click on the image to get a better view.

 

Source: http://visual.ly/sewing-machine-needle-guide.