Bootstrap 4 extended sizes classes

bootstrap-4-extended-sizing.css

.w-150px {
  max-width: 150px;
}

.w-200px {
  max-width: 200px;
}

.w-250px {
  max-width: 250px;
}

.w-300px {
  max-width: 300px;
}

/* @include media-breakpoint-up(lg) */
@media (min-width: 992px) {
  .w-lg-150px {
    max-width: 150px;
  }
  
  .w-lg-200px {
    max-width: 200px;
  }

  .w-lg-250px {
    max-width: 250px;
  }

  .w-lg-300px {
    max-width: 300px;
  }
}