- The recommended field sizes are 3.5x3.5 mm, 4x4 mm, 4.5x4.5 mm, or 5x5 mm. Circular checkmark fields must fit into squares of the recommended sizes.
- The recommended line width for checkmark field borders is 0.4 mm, irrespective of the field size.
General requirements for machine-readable forms
Checkmark field requirements
Checkmark field requirements specify recommended sizes from 3.5x3.5 mm to 5x5 mm and a 0.4 mm border line width on machine-readable forms.
Follow these requirements for checkmark fields: