I'm about to go to South Africa for a couple of months and will probably hire a Toyota Corolla. However, I cannot find out the dimensions of the boot, and I need to know because the hire company insist that the luggage must be entirely within the boot - nothing visible by folding down rear seats etc. They tell me the boot is 13 cubic feet, but that means nothing to me, I'd just like to know width, depth and height. Can you help, please?