Understanding Nail Sizes and Basic Types - The Spruce- nail tip sizes explained ,7/1/2021· Today, the penny system refers specifically to nail length. A 2d nail is 1 inch long, for example, while a 16d nail is 3 1/2 inches long. Each higher number in the penny system represents a 1/4-inch length increase, up to a 12d nail (3 1/4 inches long). After the 12d nail, the penny system does not have a clearly defined relationship to length.Acrylic Nail Tip Sizes - rotiedesign15/4/2021· Acrylic nail tips and nail tip glue. When properly sized and applied, nail tips can deliver the perfect platform for a strengthening overlay of acrylic, gel or silk/fiberglass in record time. If they're applied properly with good quality products, they will make your nails look strong, healthy and the height of ecbasket 500pcs coffin nails clear nail tips full cover artificial nails 10 sizes.