We like this Laser Measure. We set up vendor spaces and it lets us know right away, how many spaces we can fit into a venue. Just point the laser so that it connects with a wall or object and it will give you an accurate reading about how long the space is. We tested it against a normal tape measure and it was surprisingly accurate. Also it's a great cat toy by default. While trying to measure a room, the cat caught sight of it, and we had to let him chase it until he got tired so we could continue. lol