The best nail shape for sunflower nails is either square or coffin nails. Both of these nail shapes will look nice with a flowery pattern on them, depending on the length of your nails. If you like to keep your nails short, a square shape is the best. If you like to keep your nails long, a coffin shape is the best. The coffin shape looks boujee and adding sunflowers to this shape will make your nails look royal. Before painting sunflowers on your nails, you can leave the background either transparent or white to keep everything balanced. Or you can choose a pastel background for a trendier appearance. A sunflower design would look lovely in pastel pink, green, and blue.