Coffin-shaped nails (also known as ballerina’s nails) aren’t a new trend, but they’re still popular. They were popular in the ’90s but haven’t lost their appeal yet. There are many shapes of nails to choose from, each with its unique features, but the coffin-shaped nail is one of my favorite almond and stiletto-shaped nails. Coffin nails are usually very long, but they can be any length.