Needle infographic - what does each needle look like and when should it be used
BurdaStyle: Needle & Thread Cheat Sheet... Your Guide To Choosing The Right Needle And Thread (http://www.burdastyle.com/blog/your-guide-to-choosing-the-right-needle-and-thread )
Schmetz guide to sewing needles - by colour. #sewing
needles sizes and explanations of different types of needles
Sewing Machine Needle Size Chart
Here's a little primer to the most commonly used hand-sewing needles: how to recognize them and how best to use them.
Sewing Machine Needles Infographic - This totally takes the confusion out of needle selection!
Sewing Tips and Tricks
What Size Sewing Machine Needles Should I Use?
Feather's Flights: A Sewing Blog: Basics of Sewing Machine Needles