How to add padding between inline-block in IE7?

Always write to get rid of spaces between inline-block, but my situation is reversed: I need to add padding. gashes example on jsfiddle. If you look at the example in IE7, then there will be no spaces between the buttons, and I need to back were both in Chrome.

There is one catch: I can not set the marginalized, in pixels, as I have to start from the font size, I was completely satisfied with the value of margin-left: 0.02em, but IE, probably round it down and indentation does not work.