Ursa and Ursa-Basic is optimized version of Ardis icon set, which provides better user experience on smaller screens but it also works great on large displays.
Both icon themes are perfect choice for everyone who loves simplicity. You can support creator by purchasing his icon themes Ardis & Ursa, also visit creator site. You can use Unity Tweak ToolGnome-tweak-tool or Ubuntu-Tweak to change themes/icons.

Screenshots of Ursa Icons
ursa icons



Screenshots of Ursa-Basic Icons



>>> Available for Ubuntu 15.04 Vivid/14.10 Utopic/14.04 Trusty/12.04 Precise/Linux Mint 17.1/17/13
To install Ursa Icons in Ubuntu/Linux Mint open Terminal (Press Ctrl+Alt+T) and copy the following commands in the Terminal:

>>> Available for Ubuntu 15.04 Vivid/14.10 Utopic/14.04 Trusty/12.04 Precise/Linux Mint 17.1/17/13
To install Ursa-Basic Icons in Ubuntu/Linux Mint open Terminal (Press Ctrl+Alt+T) and copy the following commands in the Terminal:
That's it
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