The Bootstrap grid system has six classes:
.col- (extra small devices - screen width less than 576px).col-sm- (small devices - screen width equal to or greater than 576px).col-md- (medium devices - screen width equal to or greater than 768px).col-lg- (large devices - screen width equal to or greater than 992px).col-xl- (xlarge devices - screen width equal to or greater than 1200px).col-xxl- (xxlarge devices - screen width equal to or greater than 1400px)Edit the code below and click Run to see the result live.