Printable 1:1 gauge
Knitting needle gauge
Actual-size openings for common knitting needle shaft diameters. Rely on millimeters; US numbers can vary by maker.
Calibration square (50 mm)
After printing, measure this square with a ruler. If it is not 50 mm, your printer scaled the page — reprint at 100% / Actual size.
Gauge openings
Circles are drawn in real millimeters. Hold the object over the matching opening.