4 min read • Last updated: • OMR Editorial Team
A4 OMR Sheet Size & Technical Specifications (Dimensions, Marks & Bubbles)
These layouts use an A4 page, which measures 210 by 297 mm. Print at actual size to keep the intended layout. Check the preview for the chosen question count, then inspect one print for clear rows and complete corner marks. A correct page size alone does not guarantee a correct scan.
1. Page Dimensions & Fiducial Alignment Marks
Every PDF is authored at standard ISO 216 A4 dimensions: 210 × 297 mm (595.28 × 841.89 PostScript points).
- Page Size: 595.28 × 841.89 pt (210 × 297 mm)
- Corner Fiducial Marks (TL, TR, BL, BR): 14 × 14 pt solid #000000 squares inset 20 pt from each edge
- Stroke Weight: 0.95 pt pure black (#000000) circles on #FFFFFF background
Frequently Asked Questions (FAQ)
Are the corner alignment marks identical across all pre-built and custom sheets?
The sheet layouts include corner marks to help locate the page in the camera grader. Check the preview and your print to make sure all four marks are present. Do not crop them or assume that their presence guarantees a valid scan. Review the detected answers before using a score.