what size of tlle to use in entry way

[budman 1984]

I have a small entry way that i want to replace the purple floor tiles. Approx 6 foot by 6 foot ( there are currently about 85 8x8 tiles including the closet) Is there a general rule of thumb for SIZE of tile to use??? Small area..small tile or small area...large tile?????? I''ve never tiled but this small area is where im going to give it a try. any other advice is appreciated.