I cannot use this container for rulers to go to a retreat because it only holds/fits rulers no wider than 6.5 inches. And I like to take my 9.5 and/or 10" square rulers for squaring up blocks. This is good for a long ruler but of no use for the range of rulers you would want to have on hand when sewing away from home. I should have read the measurements better before I ordered and was quite sad that it is very limiting in size. I actually wonder if they make a larger, square carrier that would hold a 12.5" ruler? That would be more useful as I would rarely take my long ruler to a retreat.