I've created a JS fiddle to illustrate my current project. Check it out here: http://jsfiddle.net/bjankord/2EKQv/ I've noticed that when I set a height for one of the child elements within a parent that has display:box property, all other child elements adjust their height accordingly. I'm not sure if this behavior is intended with the display:box and box-ordinal-group properties, but if it is, it's causing some challenges. My intention was to use CSS box-ordinal-group to rearrange my HTML structure for responsive web designs, but the issue with heights is making it difficult.