Graph paper 5 x 5 has many uses. Here are some possible ones:
Design projects
Mapping for board/video/roleplay games
Designing floorplans
Tiling or yard landscaping
Playing pen and pencil games
Planning embroidery
Cross stitch or knitting.
Some occupational therapists use squared paper for writing practice: Artists may use grids to copy pictures. Programmers Engineers and scientists may prefer graph paper for notes that involve formulas.