Were you looking for chic nail polish? Coffin-shaped nail designs may be just what you need in your life. Before we delve into the nature of coffin nails, we know you may be wondering, “What is a coffin nail?” I’m glad you asked! A coffin nail is a very long nail shape that is round or curved until you see the square at the top of the nail. Coffin-shaped acrylic nails are becoming increasingly popular due to their unique modern aesthetic. If you’re looking for something completely different, you’ll want to check out this year’s 51 Best Acrylic Coffin Nails.