Grey circle lenses are world's most resorted circle lenses. They keep your eyes look natural whilst making them attention-grabbing.
"There is quite a bit of enlargement with these circle lenses because the diameter is 15 mm, but there isn’t a thick black ring around the edge of these lenses, so they do look more natural than dolly. Notice how they blend very well. This is because the circle lenses hare a more spotted pattern so there are gaps for your natural eye colour to blend into the lenses but your natural eye colour doesn’t overpower the circle lenses. " -- Read detailed review