.row{
    display: flex;
    justify-content: center;
 }
 .col-sm-2{
  float: left;
  padding: 12px;
  width: 25%; 
  text-align: center;
 }
 .img-responsive {
   /* max-width:100%;
    height:auto;*/
    height: 40%;
    width: 50%;
    object-fit: contain;
}