4 Way white nail file block: the inside material of the nail buffers is a very dense sponge and it has an extremely fine sanding on the 4 sides, convenient to use Nail buffers size: each the white block size is 9.5 x 2.5 x 2.5 cm/ 3.74 x 0.98 x 0.98 inch; And each pack block about 6 g in weight