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The image does give a rough idea of it's size and dimensions, but having the actual text will help as well for those out there who either can't make that distinction or perhaps for people who want to have these on their ships but are going to be specific about size restrictions.
Worst come to worst, we could put some other object in the image like a soda can, pistol, communicator, or pen in the image for visual scale reference.
However, I don't think it's it actually a problem the way it is now.
Because when I spoke with the local EMS, they mentioned that when they store stuff in their vehicles they do so with the handles out so the can grab them easily. So putting handles on the sides made sense, and the kit can be placed either way.