$font-sizes: 12, 13, 14, 16, 18, 20, 22, 26, 30; /* from 1 to 9 */

@mixin regular-size($i) {
  font-size: #{nth($font-sizes, $i)}px;
  line-height: if($i < 3, 130%, 120%);
}

@mixin regular-size-1 {
  font-size: 12px;
  line-height: 130%;
}

@mixin regular-size-1-bold {
  @include regular-size-1();
  font-weight: bold;
}

@mixin regular-size-2 {
  font-size: 13px;
  line-height: 130%;
}

@mixin regular-size-2-bold {
  @include regular-size-2();
  font-weight: bold;
}

@mixin regular-size-3 {
  font-size: 14px;
  line-height: 120%;
}

@mixin regular-size-3-bold {
  @include regular-size-3();
  font-weight: bold;
}

@mixin regular-size-4 {
  font-size: 16px;
  line-height: 120%;
}

@mixin regular-size-4-bold {
  @include regular-size-4();
  font-weight: bold;
}

@mixin regular-size-5 {
  font-size: 18px;
  line-height: 120%;
}

@mixin regular-size-5-bold {
  @include regular-size-5();
  font-weight: bold;
}

@mixin regular-size-6 {
  font-size: 20px;
  line-height: 120%;
}

@mixin regular-size-6-bold {
  @include regular-size-6();
  font-weight: bold;
}

@mixin regular-size-7 {
  font-size: 22px;
  line-height: 120%;
}

@mixin regular-size-7-bold {
  @include regular-size-7();
  font-weight: bold;
}

@mixin regular-size-8 {
  font-size: 26px;
  line-height: 120%;
}

@mixin regular-size-9 {
  font-size: 30px;
  line-height: 120%;
}