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The in-progress icon set can be found here.
* All icons must be vector-based.
* All toolbar icons must be monochrome with a transparent background.
* Toolbar icons should be 24x24 px with 1px margins.
* If the symbol is narrow, rotate it 45° left or right to fill the focal space.
* All icons must be international and untranslatable. Don't use the "B" symbol for "Bold" or "I" for "Italics", but simply use lowercase "a" with the appropriate formatting applied.
* Keep elements aligned to a square pixel grid for sharpness.
If in doubt, refer to the Gnome icon design guidelines .
* Icons should be submitted in the SVG format.
* Use a single layer only.