I got the idea while looking for a new mattress and was having trouble finding a good way to compare the different sizes. I figured others also had a similar problem so I decided to make a tool to fix the issue. You can easily pick a standard bed size like twin or queen or add a custom size. Then the diagram will automatically show the size comparison between the mattresses. It was a fun weekend project, and I would love any feedback on what to add or fix. Here is the link if you want to...