In the November 2011 issue of The Artist’s Magazine, we share 28 tools you can’t live without in the feature article, “Tools That Are Tried-and-True.” In this excerpt, Robert Armetta shares his tip for checking proportions while painting.

“An inexpensive pair of plastic calipers enables me to check proportions easily and more accurately than simply using my thumb and the back of a paintbrush, which is the more common method. Because of the points on the calipers, I can check subtle proportional relationships between the corners of the eyes in a portrait, for example, and compare them with the width of the mouth.”  ~Robert Armetta

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