PT Sans is a sans-serif font. It goes well with PT Serif, Trend Sans One, Crimson, Lucida Grande, Droid Sans, Font Awesome, Source Sans Pro, Trump Gothic East, Playfair Display and Bodoni. If you're thinking about using PT Sans then try 48px for headers. Give 18px a shot for content.
People commonly tag it as uppercase, design, blog, restaurant, sans serif, agency, classic, decorative, art deco and magazine. You can get it from Font Squirrel, Fontdeck, Fonts.com, Fontshop, Google Web Fonts, MyFonts, Typekit and YouWorkForThem.