I love using OOCSS grid names like .size1of2 or .size3of5, they are really handy. The problem I have with them though is that they make no sense in a responsive design where a grid of .size1of3 on a big screen might be a grid of .size1of2 on a slightly smaller screen.
Use the same classNames and don't care about the exact width. So a .size1of3 can actually be 33% wide on a big screen and 50% wide on a smaller screen and probably 100% on a very small screen. I have a problem with this, you might understand that.
What you could do is use different classNames for different resolutions. That might result in classes like .xl1of2, .l1of2, .m1of2, .s1of2 and xs1of2 which would result in HTML like this:
<div class="xl1of8 l1of6 m1of3 s1of2 xs1of1">
</div>It looks a bit dirty. And it assumes that it's possible to create a predefined set of grids.
I'm not really happy with these two options. That's why I wrote this gist. I hope you have better ideas for this issue. Please let me know.
Another option is to use col classes I guess. It's a more general naming convention which doesn't cause as much confusion as .size1of3 and .size1of4 do.
In this desktop example, it shows that the col-8 should be wider than the col-4 and more specifically, the col-8 should be double the width of the col-4.
For tablets it could mean that the .col-8 class will be half the width it was before and the same for the .col-4. This way it still makes sense what you are doing to the widths in my opinion.
I guess for smartphones it doesn't really matter what classes you use because you probably will set them to 100% width and won't float anything.
It won't be the best solution either but it might be less confusing than the size classes?