bootstrap grid

.col-sm-3half, .col-sm-8half {
    position: relative;
    min-height: 1px;
    padding-right: 15px;
    padding-left: 15px;
}

@media (min-width: 768px) {
    .col-sm-3half, .col-sm-8half {
        float: left;
    }
    .col-sm-3half {
        width: 29.16666667%;
    }
    .col-sm-8half {
        width: 70.83333333%;
    }
}        <div class="col-lg-3 mb-4">

offset-md-4<div class="container">
  <div class="row">
    <div class="col-sm">
      One of three columns
    </div>
    <div class="col-sm">
      One of three columns
    </div>
    <div class="col-sm">
      One of three columns
    </div>
  </div>
</div>--------------------------------------------------------------------------------------
Bootstrap Container Width			 					| Size        | Class Prefix
--------------------------------------------------------------------------------------
Extra small devices Phones (less than 768px)  			| None (auto) | .col-xs-
Small devices Tablets (greater than equals 768px) 		| 750px       | .col-sm-
Medium devices Desktops (greater than equals 992px)     | 970px       | .col-md-
Large devices Desktops (greater than equals 1200px)     | 1170px      | .col-lg-