A device incorporating visible alignment features which allow the precision trimming of fabric into geometric shapes of a fixed size is disclosed. The device also allows trimming of fabric figures composed of simpler geometric shapes, including guides for rotary trimmers or other cutting implements to remove excess fabric at the seam created by the most common method of creating such figures, to produce figures of specified size and shape with no measuring required. The device incorporates a plurality of trimming slots and indexing indicators allowing it to be used to produce such figures. A method of using the device to produce multiple final fabric pieces from a single section of base fabric is also disclosed.