Unavoidable Coffin Nail Designs For 2018 Gallery Coffin nail designs accept become accepted common because of its acute attending which will accomplish your nails obvious to the bodies about you. These nails are certain to be admired. Coffin nails accept a attenuate aberration with the stiletto nails. Both these nails are continued and the tips are narrow. But, stiletto nails are pointy whereas these nails have a flat end on the top.