If you have said Yes, then below are some ways to make the diamond look bigger than it is.
A Thinner Band
The more delicate the band, the larger the stone should appear. In contrast, a thicker band would dwarf any stone set on it. A split band diamond ring is a superb idea, and so is a double banded design. Either can frame the stone perfectly and not overshadow it.
A Smaller Setting
The setting has great bearing on how big the stone looks. Something chunky like a prong setting will occupy a lot of space at the edge, which is bad. A subtle four prong setting, on the other hand, can create and carry the illusion of a large diamond.