For the last several years (which is like, decades in social-media years), the Coffin Acrylic Nail shape has been extremely popular on Instagram, and for good reason: They're edgy (literally, there are so many edges), gentler than the dagger-like stiletto nail, and long and wide enough to carry out the best nail art patterns. If you want the look of stiletto nails without the entire poking-your-eye portion, paint the centre of the nails with nude nail polish and the edges of the Coffin Acrylic Nail shape with black to give the illusion of a sharp pointed tip. How long do Coffin Acrylic nail last? Coffin Acrylic Nails will last around the same amount of time as other acrylics: six to eight weeks. You should do everything you can to keep them healthy, such as keeping the skin around them clean and shapely, but they will need to be removed or replaced after this time because your natural nails will have grown out. If your coffin nails aren't acrylic, you'll have to put in...