Trending Coffin Nail Shapes White : White polishes (we love shimmery white pretty woman nail polish in ice queen ) give almond nails a modern twist, but if what they are: To create coffin shaped nails, file the edge of each side toward the center, and file off the tip. Coffin Nail Shapes White : When choosing nail coffin design, it is better to opt for a color coating or a more sober.