FREE! Sass (SCSS) mixin for easily setting the width and height (size) and an element.

input.scss

@mixin size($width, $height: $width) {
  width: $width;
  height: $height;
}

// Examples
#foo {
  @include size(10px);
}

#bar {
  @include size(10px, 20px);
}

output.css

#foo {
  width: 10px;
  height: 10px; }

#bar {
  width: 10px;
  height: 20px; }