SASS helper for border widths

_border-widths-helpers.scss

// Specify widths (in px) for available borders
$widths: (1, 2, 3, 4, 5, 6, 7, 8);

@each $width in $widths {
    .bw-#{$width} {
      border-width: #{$width}px !important;
    }
}

style.css

// Generated CSS for above script 

.bw-1 {
  border-width: 1px !important;
}

.bw-2 {
  border-width: 2px !important;
}

.bw-3 {
  border-width: 3px !important;
}

.bw-4 {
  border-width: 4px !important;
}

.bw-5 {
  border-width: 5px !important;
}

.bw-6 {
  border-width: 6px !important;
}

.bw-7 {
  border-width: 7px !important;
}

.bw-8 {
  border-width: 8px !important;
}