Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.4.7)
// Compass (v1.0.1)
// ----

@mixin size($size, $modulo: 5) {
  @if $size % $modulo == 0 {
    width: unquote('#{$size}%') !important;  
  }
}

@mixin series($name: "size", $step: 5, $limit: 100) {
  @for $size from 1 through floor($limit / $step) {
    $size: $size * $step;
    .#{$name}-#{$size} { @include size($size, $step) }
  }
}

@include series("size", 5, 100)

SassMeister-output.css

.size-5 {
  width: 5% !important;
}

.size-10 {
  width: 10% !important;
}

.size-15 {
  width: 15% !important;
}

.size-20 {
  width: 20% !important;
}

.size-25 {
  width: 25% !important;
}

.size-30 {
  width: 30% !important;
}

.size-35 {
  width: 35% !important;
}

.size-40 {
  width: 40% !important;
}

.size-45 {
  width: 45% !important;
}

.size-50 {
  width: 50% !important;
}

.size-55 {
  width: 55% !important;
}

.size-60 {
  width: 60% !important;
}

.size-65 {
  width: 65% !important;
}

.size-70 {
  width: 70% !important;
}

.size-75 {
  width: 75% !important;
}

.size-80 {
  width: 80% !important;
}

.size-85 {
  width: 85% !important;
}

.size-90 {
  width: 90% !important;
}

.size-95 {
  width: 95% !important;
}

.size-100 {
  width: 100% !important;
}