A4 · Portrait
210 × 297 mm · ISO 216
Curvilinear five-point grid - full-room interior wide-angle.
A curvilinear "fisheye" perspective scaffold with vanishing points at the four cardinals and a fifth at the centre. Lines bow outward from the centre, mimicking what a wide-angle lens or the human peripheral field actually sees in a small room. Useful for full-room interior studies and concept work that wants to feel inhabited rather than measured. Further reading: A practitioner reading list covers the standards lineage in more depth.
Curvilinear perspective is documented in M. H. Pirenne, "Optics, Painting and Photography" (Cambridge, 1970).
Curvilinear perspective was studied formally by the Belgian artist Jean Fouquet in the 15th century and revived by 20th-century painters like Albert Flocon and André Barre, whose 1968 book "La Perspective Curviligne" remains the standard reference.
Every variant on this page is delivered as a vector SVG with physical millimetre dimensions baked into the file, so a compliant printer driver will reproduce it at exact 1:1 scale by default. Choose the sheet size that matches your printer tray, set scaling to 100 % (never "fit to page"), and verify with the calibration check on our how-to-print guide. Buyer's guide: Comparing the major architectural scale rulers can help you pick the right physical scale rule to use over the printed grid.
210 × 297 mm · ISO 216
297 × 210 mm · ISO 216
297 × 420 mm · ISO 216
420 × 297 mm · ISO 216
420 × 594 mm · ISO 216
594 × 420 mm · ISO 216
216 × 279 mm · ANSI A
279 × 216 mm · ANSI A
216 × 356 mm · US Loose
356 × 216 mm · US Loose
279 × 432 mm · ANSI B
432 × 279 mm · ANSI B