525icons is a very comprehensive and versatile web icon collection designed for websites and apps.
Most of the icons are designed, customized and vectorized "by hand" in Adobe Illustrator before the processing into a font. A few are directly copied from the different open source icon packs that are available online, among them the "IcoMoon - Free" pack and the "Font Awesome" icon collection. Some are known brand logos, vectorized from png format or copied from open source svg files found on the net.
The icons in the set are optimized within a 16px grid. You will get crisp results by setting your font-size to 16px, 32px, 48px, etc.
The ux-2x - 7x classes are based on (16 × Npx) sizes.
The css code is adapted from the Font Awesome css-toolkit by Dave Gandy. More info: here
The font is assembled in the IcoMoon App .
In the download package: 525icons.zip, you will find the document demo.html, where you may further investigate the css-codes in use. In the fonts folder, you also will find the font in otf format, which you may install for use in PC or Mac applications.
Click on the icon below to view an example of the font in use inside of Illustrator: