Asteroid 2018 NW has a diameter of around 16 meters, which is around as much as 100 hot dogs. But hold onto your buns because it isn't going to hit us – though it may fly close.
The "size" of 100 hot dogs is misleading. It is not a pile of 100 hot dogs to demonstrate the volume of the asteroid, but a line of 100 hot dogs to demonstrate the diameter, which is 16 meters. So in volume, this is a lot more than 100 hot dogs!