Same height for each element in a list

I’m creating a 2x2 list (see attachment) and what I am wanting to achieve is the boxes all to be the same height, regardless of content. This seems like something that should be built in, but I can’t find a way to do it. It’s ugly as hell having them different sizes like this, and I want to add the same size background image to each one, too. The same is happening where I have three side by side in a single row where I’m showcasing three equal options and so want them the same height.
Any suggestions?