This is one of the things I really liked about the WotC Star Wars RPG that came out quite a while ago... in that I believe each square was identified as a meter long, rather than 5 feet. I would presume that is also how it's done in European printings too? By identifying the distances in that way... it does make for more "realistic" sizes for corridors and rooms. Most corridors in a building are like 3 to 3.5 feet wide, meaning that a map that uses a single square for a corridor would be more on the money. And then a room shown to be 3x4 squares on the map, ends up being only about 10x12 feet... which is a much more normal size for a room than chambers ending up being 15x20 feet when using 5' squares. So 1 meter squares lets you get more squares into a room for movement purposes, without making the sizes of these places unreasonably large.
It also makes things a lot easier for counting distance when 1 square = 1 meter, rather than having to recalculate in the moment when 1 square = 5 feet.