we created some grid samples now you can examine in your browser. This first grid is using all 4 grid sizes combined in a single row. second grid indicates xs Grid,Third grid indicates sd Grid,fourth grid indicates md,fifth grid indicates lg.
lg indicates that the large grid displaying. The grid stacks horizontally < 1200px.
md indicates that the medium grid displaying. The grid stacks horizontally < 992px.
sm indicates that the small grid displaying. The grid stacks horizontally < 768px.
xs indicates that the extra small grid displaying. This grid is always horizontal.