<div class="parent">
        <div class="child"></div>
   <div class="child"></div>
  
    </div>
.parent {
   width: 140px;
   margin: 0 auto;
   background-color:pink;
   padding: 1px; 
/*  border: 1px solid transparent; */

        }

        .child {
            width: 100px;
            height: 100px;
            margin: 20px;
            background-color: rosybrown;
      
        }
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