Square or desired width-height for an element

_size.scss

/* @author Bilal Cinarli */

/** -------------------------------------------
    Size Related Mixins
    ------------------------------------------- **/
/**
 * Square or desired width-height for an element
 */
@mixin dims($width, $height: null) {
    width: $width;
    @if $height == null {
        height: $width;
    }
    @else {
        height: $height;
    }
}