Fluid responsive 12 colum grid example:

col-xs-7 col-sm-8 col-md-9 col-lg-10

col-xs-5 col-sm-4 col-md-3 col-lg-2

col-xs-12 col-4

col-xs-12 col-sm-6 col-md-3 col-lg-3

xs-hide col-2

col-xs-12 col-10

col-xs-12 col-4 inside col-10

Fluid non-responsive 12 colum grid example:

col-12

col-11

col-1

col-10

col-2

col-9

col-3

col-8

col-4

col-7

col-5

col-6

col-4

col-3

col-2

col-10

col-4 inside col-10