One
Two
Three
Four
Five
Six
Seven
.box { display: flex; flex-wrap: wrap; } .box>* { flex: 1 1 200px; }
<div class="box"> <div>One</div> <div>Two</div> <div>Three</div> <div>Four</div> <div>Five</div> <div>Six</div> <div>Seven</div> </div>