It extends in length indefinitely until it is cut or worn away by use. The nail plate is set in grooves that are located on the dorsal surface of the distal part of the digit. These grooves are referred to as the lateral and proximal nail grooves. The grooves are covered by the lateral and proximal nail folds. The nail plate is a translucent and colorless structure.
Most digits display a white semicircular lunula at the proximal end of the nail plate.
The lunula ends distally in the nail matrix. The matrix is the region which synthesizes the nail plate. It extends approximately 5 mm underneath the proximal nail fold.