<style> .container::after{content: "";display: block;clear: both; } .box{float: left;width: 32%;padding-bottom: 32%;background-color: red;margin-bottom: 1%; } .box:not(:nth-child(3n)){margin-right: 1%; } </style> <div class="container"> <div class="box"></div> <div class="box"></div> <div class="box"></div> <div class="box"></div> <div class="box"></div> <div class="box"></div> <div class="box"></div> <div class="box"></div> <div class="box"></div> </div>
