Sector-shaped scale

The invention discloses a sector-shaped scale. The sector-shaped scale comprises a sector-shaped scale body (1), wherein scale marks are arranged on straight line portions on two sides of the sector-shaped scale body (1), a round protrusion (2) is arranged on a long arc portion of the sector-shaped scale body (1), a suspending hole (3) is arranged on the round protrusion (2), a concave arc-shaped notch (4) is arranged on a short arc portion of the sector-shaped scale body (1), the diameter of the arc-shaped notch (4) is equal to the inner diameter of a material disk (5) to be measured. By the aid of the sector-shaped scale, checking measurement is conducted for warehousing of residual material strips, the scale is convenient to operate and high in measurement precision, material strips are not damaged and polluted, the checking efficiency is improved, losses caused by manpower can be reduced, and the scale is time-saving, effort-saving, simple in design, easy to implement and convenient to use.