I'm adding this code to my Bootstrap3.3 project with the same grid columns breakpoints, based with the @guest answer. Before I have used the Bootstrap 4 padding and margins helper it seens to be a good choice.
/*Margin and Padding helpers*/
/*xs*/
.p-xs { padding: .25em; }
.p-x-xs { padding: 0 .25em; }
.p-y-xs { padding: .25em 0 ; }
.p-t-xs { padding-top: .25em; }
.p-r-xs { padding-right: .25em; }
.p-b-xs { padding-bottom: .25em; }
.p-l-xs { padding-left: .25em; }
.m-xs { margin: .25em; }
.m-x-xs { margin: 0 .25em; }
.m-y-xs { margin: .25em 0 ; }
.m-r-xs { margin-right: .25em; }
.m-l-xs { margin-left: .25em; }
.m-t-xs { margin-top: .25em; }
.m-b-xs { margin-bottom: .25em; }
/*sm*/
@media (min-width:768px){
/*sm*/
.p-sm { padding: .5em; }
.p-x-sm { padding: 0 .5em; }
.p-y-sm { padding: .5em 0 ; }
.p-t-sm { padding-top: .5em; }
.p-r-sm { padding-right: .5em; }
.p-b-sm { padding-bottom: .5em; }
.p-l-sm { padding-left: .5em; }
.m-sm { margin: .5em; }
.m-x-sm { margin: 0 .5em; }
.m-y-sm { margin: .5em 0 ; }
.m-t-sm { margin-top: .5em; }
.m-r-sm { margin-right: .5em; }
.m-b-sm { margin-bottom: .5em; }
.m-l-sm { margin-left: .5em; }
}
/*md*/
@media (min-width: 992px){
.p-md { padding: 1em; }
.p-x-md { padding: 0 1em; }
.p-y-md { padding: 1em 0; }
.p-t-md { padding-top: 1em; }
.p-r-md { padding-right: 1em; }
.p-b-md { padding-bottom: 1em; }
.p-l-md { padding-left: 1em; }
.m-md { margin: 1em; }
.m-x-md { margin: 0 1em; }
.m-y-md { margin: 1em 0 ; }
.m-t-md { margin-top: 1em; }
.m-r-md { margin-right: 1em; }
.m-b-md { margin-bottom: 1em; }
.m-l-md { margin-left: 1em; }
}
/*lg*/
@media (min-width: 1200px){
.p-lg { padding: 1.5em; }
.p-x-lg { padding: 0 1.5em; }
.p-y-lg { padding: 1.5em 0; }
.p-t-lg { padding-top: 1.5em; }
.p-r-lg { padding-right: 1.5em; }
.p-b-lg { padding-bottom: 1.5em; }
.p-l-lg { padding-left: 1.5em; }
.m-lg { margin: 1.5em; }
.m-x-lg { margin: 0 1.5em; }
.m-y-lg { margin: 1.5em 0; }
.m-t-lg { margin-top: 1.5em; }
.m-r-lg { margin-right: 1.5em; }
.m-b-lg { margin-bottom: 1.5em; }
.m-l-lg { margin-left: 1.5em; }
}
/*xl*/
.p-xl { padding: 3em; }
.p-x-xl { padding: 0 3em; }
.p-y-xl { padding: 3em 0 ; }
.p-t-xl { padding-top: 3em; }
.p-r-xl { padding-right: 3em; }
.p-b-xl { padding-bottom: 3em; }
.p-l-xl { padding-left: 3em; }
.m-xl { margin: 3em; }
.m-x-xl { margin: 0 3em; }
.m-y-xl { margin: 3em 0; }
.m-t-xl { margin-top: 3em; }
.m-r-xl { margin-right: 3em; }
.m-b-xl { margin-bottom: 3em; }
.m-l-xl { margin-left: 3em; }``