As long as a late breakfast. This saying is used when a very tall person is seen.
As broad as it's long.
As straight as a ribbon, or a barrell or a rush.
As smooth as glass.
As level as an iron road.
As steep as a cliff.
As white as snow.
As black as soot.
As yellow as the inside of a new boot
As green as a leaf or grass.
As grey as a badger.
As dark as pitch.
As bright as day.
As brown as a berry.
As flat as a pancake.
As deep as a drawwell.
As clean as a new pin, or a whistle
As cold as death.
As mad as a hatter or a march-hare.
As wild as a goat.
As clever as a cat.
As cunning as a fox.
As tame as a lamb.
As timid as a mouse.