One of the smallest croton plants is Mammy - a red variety with bright red, yellow and green leaves (pictured above), or a yellow Mammy with yellow foliage and a bit of green.
The Mammy croton can be maintained about 2 to 2-1/2 feet.
Different varieties can be planted together for a riot of color and a mix of textures, or place several of the same variety to grow together in a "drift."

These gorgeous shrubs can jazz up an all-green landscape or work well with flowering shrubs or other plants prized for their bright foliage like the Ti plant (cordyline 'Red Sister').
A benefit of mixing crotons with flowering shrubs is the consistency of color in the landscape, even while other plants are not in bloom.