.custom-select-sx {
  display: inline-block;
  width: 100%;
  height: $input-btn-line-height-sx;
  padding: $input-btn-padding-y-sx ($custom-select-padding-x + $custom-select-indicator-padding) $input-btn-padding-y-sx ($input-btn-padding-y-sx * 3);
  font-family: $custom-select-font-family;
  @include font-size($input-btn-font-size-sx);
  font-weight: $custom-select-font-weight;
  line-height: $custom-select-line-height;
  color: $custom-select-color;
  vertical-align: middle;
  background: $custom-select-background;
  background-color: $custom-select-bg;
  border: $custom-select-border-width solid $custom-select-border-color;
  @include border-radius($custom-select-border-radius, 0);
  @include box-shadow($custom-select-box-shadow);
  appearance: none;

  &:focus {
    border-color: $custom-select-focus-border-color;
    outline: 0;
    @if $enable-shadows {
      box-shadow: $custom-select-box-shadow, $custom-select-focus-box-shadow;
    } @else {
      box-shadow: $custom-select-focus-box-shadow;
    }

    &::-ms-value {
      // For visual consistency with other platforms/browsers,
      // suppress the default white text on blue background highlight given to
      // the selected option text when the (still closed) <select> receives focus
      // in IE and (under certain conditions) Edge.
      // See https://github.com/twbs/bootstrap/issues/19398.
      color: $input-color;
      background-color: $input-bg;
    }
  }

  &[multiple],
  &[size]:not([size="1"]) {
    height: auto;
    padding-right: $custom-select-padding-x;
    background-image: none;
  }

  &:disabled {
    color: $custom-select-disabled-color;
    background-color: $custom-select-disabled-bg;
  }

  // Hides the default caret in IE11
  &::-ms-expand {
    display: none;
  }
}