inuitcss’ widths tooling allows you to generate a suite of utility classes for sizing pieces of UI responsively, e.g.:
@include inuit-widths(12);
…will generate a series of classes in the format .u-7/12 to be used for
sizing.
Install using Bower:
$ bower install --save inuit-tools-widths
Install using npm:
$ npm install --save inuit-tools-widths