I have that cage and there's loads of room in it.
That photo makes it look tiny.
Bunky's has room for a Savic house, a silent spinner, a large wooden chew cube, a Savic Spuntik, a bridge made of those bend wood willow sticks (the name escapes me.
) This corn toy, a play ball, a hamster potty, aswell as some wooden chews, and obviously his water bottle and food.