While the icons should be as clear as possible, Dashicons are also friendly and reassuring. Slightly rounded edges are encouraged over sharp, 90º angles. Try a squircle. When given the choice, angle them to the right; e.g., the “Tools” icon starts off on the lower-left and angles to the upper-right of the canvas.

Icon Guidelines

  • Icons live in a 20×20 pixel grid
  • Lines should be 2px wide (ex: https://cloudup.com/cYgij8rwfXS)
  • Corner radius should measure 1pt/px (ex: https://cloudup.com/c4Hh9J3lbbz)
  • They should be simple. Consider extraneous details within the icon. Are they really necessary?
  • They should be universal. Are your own demographics influencing the symbol you’ve chosen for the icon?
  • They should be consistent. Examine your icon in context. How would it look in the wp-admin environment?

Resources