Pyrotechnics are an extremely diverse effect, simply from the sheer amount of product that is available to use.
Gerbs, mines, comets, airbursts, saxons and robotics are just a few types of visually different product that can be several different colors and used for extremely different results.
Not only are pyrotechnics diverse in appearance, but in size.
They can range from a few feet to a couple of hundred feet, depending on the venue.