Sandpaper/ˈsændpeɪpər/ Definition 1 of 3Pro Tip 1/3Texture Reference Sandpaper is commonly used to describe rough textures in various contexts. His voice was as rough as sandpaper. Pro Tip 2/3Grain Sizes Sandpaper comes in different grit sizes; the lower the number, the coarser the grit. Start with a 60-grit sandpaper and finish with a 120-grit. Pro Tip 3/3Physical Sensation The word 'sandpaper' can evoke a physical sensation when used in metaphors. Walking in these new shoes is like sandpaper against my heels.