col-md-3 class in bootstrap css code example
Example 1: .col-6 bootstrap
.col-6{
flex: 0 0 50%;
max-width: 50%;
}
Example 2: col-md-6 bootstrap
<div class="col-lg-2 col-md-4 col-sm-3 "> Your Stuffs </div>
/*
col-lg for large
col-md for med
col-sm for small
enjoy :)
*/