[evanm]

Couldn't this be reduced by, like, a lot by simply using this CSS3 gem?

height: attr(sata-cp-size px);

[bennettfeely]

Someday, but right now the support for using 'attr()' function in properties other than 'content' is very poor.

[nness]

Correct, attr() for use with anything than the content property is unsupported by most browsers.

(https://developer.mozilla.org/en-US/docs/Web/CSS/attr)

[RussianCow]

Yes, once we get to the point where we can stop supporting IE <= 9. :)