<!DOCTYPE html> <html reftest-zoom="2"> <head> <title>background-size + zoom</title> <style type="text/css"> html { margin: 0; padding: 5px; } body { margin: 0; padding: 0; } #outer { border: 1px solid black; width: 64px; height: 128px; } #inner { width: 64px; height: 128px; background-image: url(aqua-32x32.png); background-repeat: no-repeat; background-size: 25%; } </style> </head> <body> <div id="outer"><div id="inner"></div></div> </body> </html>