Quick exemplary responsive SASS Setup

responsive.sass

$max-page-width:                    1600px
$min-page-width:                     320px
$compact-max-page-width:             500px

$break-xsmall:                       320px
$break-small:                        480px
$break-medium:                       700px
$break-large:                        880px
$break-xlarge:                      1280px

@mixin between($min, $max)
  @media only screen and (min-width: $min) and (max-width: $max)
    @content

@mixin respond-to($media)
  @if $media == xsmall
    @media only screen and (min-width: $break-xsmall)
      @content
  @else if $media == small
    @media only screen and (min-width: $break-small)
      @content
  @else if $media == medium
    @media only screen and (min-width: $break-medium)
      @content
  @else if $media == large
    @media only screen and (min-width: $break-large)
      @content
  @else if $media == xlarge
    @media only screen and (min-width: $break-xlarge)
      @content
  @else
    @media only screen and (min-width: $media)
      @content