A sheet of paper commonly found in spiral-bound notebooks. These notebooks typically have a metal or plastic coil binding that allows the sheets to be easily turned.
In astronomy, a spiral sheet could refer to the flattened, rotating disks of stars, gas, and dust that make up spiral galaxies. Examples include the Milky Way.
In the context of crafts or design, a spiral sheet might refer to a sheet of material (paper, plastic, etc.) with a spiral pattern or design.