Image sizing via CSS doesn't work in IE8

[sbds]

I have style like this:\[code\]input.date_picker, input.datetime_picker { background-image: url("/images/calendar.png"); background-size: 16px 16px; background-position: right center; background-repeat: no-repeat;}\[/code\]My datepicker inputs have this small calendar positioned to right and sized 16x16. In IE8 it doesn't work and image takes whole background.