grafana/public/sass/utils/_widths.scss

.max-width { width: 100%; }
.width-auto { width: auto; }

// widths
@for $i from 1 through 30 {
  .width-#{$i} {
    width: ($spacer * $i) - $gf-form-margin !important;
  }
}

@for $i from 1 through 30 {
  .max-width-#{$i} {
    max-width: ($spacer * $i) - $gf-form-margin !important;
    flex-grow: 1;
  }
}

@for $i from 1 through 30 {
  .offset-width-#{$i} {
    margin-left: ($spacer * $i) !important;
  }
}