The Dracaena Marginata aka Dragon Tree, is a great low maintenance plant for adding drama to a space. They tolerate low light, but will really thrive in medium to bright indirect light. They are a tropical plant and like to be watered when the top 2-3" of soil feel dry.
The 4" is in a 4" pot and about a foot tall.
The 8" is in a 8" pot and about 2.5ft tall.
The 10" is in a 10" pot and is about 4.5-5 feet tall.
They are considered slightly toxic to animals if eaten.