While whether a ring looks good on your finger comes down to subject preferences, here are some options that are bound to suit wider fingers and make them look slimmer.
Double Halo Ring Setting
Floating double-halo engagement ring white gold
Double halo ring setting. See it here.
The double halo comes in a variety of styles and is a very versatile setting. Its best features are that it can make a smaller center stone appear larger than it is, adds a good amount of sparkle and brilliance to the ring design and makes the overall setting appear elaborate and luxurious. Double halo settings are often quite attention-getting styles and are ideal for larger hands and fingers.