The casket or coffin shaped nail is an edgy spinoff of the classic square nail. This look helps spice up your look while remaining classy at the same time. Blue Acrylic Nails, Coffin Shape Nails, Nail Arts, Ballerina Nails, Nail Shapes, Matte Nails, Best Acrylic Nails, Gorgeous Nails, Cute Acrylic Nails