These are the mechanical specifications for the X-Rite Eye-One iO for color bar artwork:

• Minimum spot size: 7 x 7 mm (0.27 x 0.27 in.)
• Include a leading and trailing white patch
• Positioning area: 240 x 310 mm (9.44 x 12.20 in.)
• Positioning accuracy: +/- 0.25 mm (0.01 in.)