Isometric Paper, 1/8 Inch Triangle Side, A4 Portrait
Continental technical drawing courses sometimes move to eighth-inch isometric grids once students master larger cells. Each equilateral side is 1/8 inch long; vertical guide lines sit about 0.108 inch apart. That altitude is the column spacing, not the edge length named on the syllabus.
Related grids
1/4 inch triangle side — Letter
1/4 inch equilateral cell edges on Letter portrait. Vertical columns about 0.22 inch apart. True-scale PDF for axonometric sketches.
1/4 inch triangle side — Letter landscape
Landscape isometric paper with 1/4 inch triangle sides on Letter. Wide layout for corridors, floor strips, and long axonometric scenes.
1/4 inch triangle side — A4
1/4 inch equilateral cells on A4 portrait. Vertical columns about 0.22 inch apart. Free PDF for design coursework.
1/4 inch triangle side — A4 landscape
Landscape isometric grid on A4 with 1/4 inch triangle sides. Wide format for game maps and technical strip layouts.
5 mm triangle side — Letter
5 mm equilateral cell edges on Letter portrait. Vertical columns about 4.3 mm apart. Metric three-axis paper for design sketching.