Getting image width and height from compass sprites

[mipmap]

I'm having trouble getting the image width and height when generating a sprite from compass. I'm using Scout for my live watch and already configured my images folder. I have my images that I want to sprite in a folder called common.Here's my code\[code\]@import "common/*.png";.facebook { @include common-sprite(facebook); }\[/code\]This works and generates the background position, but I want to get the width and height. Any would be awesome!