No - they are all over the shop in terms in size. They were the first maps I ever did, and some are problematic.

In any case, the 'right size to use with minis' can always be fixed - you can scale and print maps out to the sizes that you want. I believe for minis you need 1 grid square to an inch. The scale of these maps vary but I checked the last one and it is 1 grid square = 0.83 of an inch for my printer (note - the final scale of the printed image depends on two things: the scale of the digital image, and the printer settings). This is pretty close (the map is a little too big, and should be scaled down slightly).