Isometric Paper 1/4 in, Letter Portrait
Each equilateral cell on this grid has a 1/4 inch side length. Vertical guide lines sit every 0.22 inch, which is the altitude of that triangle. Isometric projection keeps all three axes equally foreshortened, so cubes, machine parts, and game tiles read without perspective distortion. Portrait Letter fits standard US printers.
What you need at the desk
- A basic home inkjet or laser printer — print at 100%, scaling off (opens in new tab)
- Letter-size copy paper (32 lb) for crisp lines and margins (opens in new tab)
- Black ink or toner cartridges matched to your printer (opens in new tab)
- A mechanical pencil with a consistent line for grid work (opens in new tab)
- A clear ruler that lines up with printed squares (opens in new tab)
- A three-ring punch if you are building a lab notebook (opens in new tab)
As an Amazon Associate I earn from qualifying purchases. Full affiliate disclosure
Related grids
1/4 inch — Letter
Download free 1/4 inch square graph paper sized for US Letter paper. Prints at true scale for classroom math, coordinate plotting, and sketching.
1/5 inch — Letter
Free 1/5 inch square graph paper on Letter for math, science, and sketching. True-scale metric or inch grid PDF — print at 100% actual size, scaling off.
1/8 inch — Letter
Free 1/8 inch square graph paper on Letter for math, science, and sketching. True-scale metric or inch grid PDF — print at 100% actual size, scaling off.
1/10 inch — Letter
Free 1/10 inch square graph paper on Letter for math, science, and sketching. True-scale metric or inch grid PDF — print at 100% actual size, scaling off.
2 mm — Letter
Free 2 mm square graph paper on Letter for math, science, and sketching. True-scale metric or inch grid PDF — print at 100% actual size, scaling off.