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.
East to West (Horizontal) Orientation
east to west engagement ring
East to west ring design by Adina Stone. See it here.
East to west gemstone orientation provides adequate coverage for wider fingers. They stretch the gemstone across the finger, providing perfect balance between the height and width of the finger. It’s an excellent style to choose if you’re trying to de-emphasize the width of your fingers but note that this can be seen as a trendy design, and may cycle in and out of fashion.