Flex grow different size containers This is a working solution for 12 column designs (in the 1140/1120 grid) where the containers have different widths. Also on tablet and mobile I have put everything on 100%, but you can ofcourse change this according to your design. 2 columns 15,18% Grow 3 columns 23,66% Grow 4 columns 32,14% Grow 5 columns 40,63% Grow 6 columns Grow Grow 7 columns 57,59% Grow 8 columns 66,07% Grow 9 columns 74,55% Grow 10 columns 83,04% Grow