Edit part 19727pr0077 Minifig Head Special, Cube with Rear Ledge, Pixelated Black, Light Bluish Grey, Dark Bluish Gray Face Print (Red)

The number you see printed on the part
Element numbers used for this part
Use the longer side (number or fraction)
Use the shorter side (number or fraction)
A standard brick is 1, a standard plate is 1/3 (number or fraction)