So in Bootstrap v4, I see there\'s a new feature for card decks ( http://v4-alpha.getbootstrap.com/components/card/#decks ) that makes a group of cards, with their height equal
I found a pretty easy workaround using css-grid. You could tweak the 250px to fit your use case.
.card-deck { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); grid-gap: .5rem; }