What does stamp perforation gauge mean?

It is the number of perforations or teeth measured across a 2 cm span. A compound gauge lists horizontal and vertical measurements separately.

Can a normal phone photo measure perforations exactly?

Not without a reliable scale reference. Perspective and resizing change pixel measurements, so use a physical gauge, calibrated scan, or manual 2 cm count.

Why does perforation gauge matter?

Some stamp designs exist with several perforation varieties. The gauge can help separate catalog listings that otherwise look similar.

Should I measure from the front or back?

Either can work, but the back often makes the holes easier to see. Keep the stamp flat and avoid handling the gum unnecessarily.

Free perforation tool

Estimate a postage stamp’s perforation gauge

Upload a sharp photo and, when possible, enter the number of perforations across a measured 2 cm edge. Get a cautious gauge and measurement guidance.

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Perforations across 2 cm (optional)If you measured one edge with a ruler or gauge, enter the count here.Collector notes (optional)Add details that may be hard to read in the photo.0/500

How do you measure a stamp perforation gauge?

Stamp perforation gauge is the number of perforation holes or teeth across a 2 centimeter span. Align a physical gauge with the holes, use a calibrated scan, or count across an accurately measured 2 centimeter edge. Measure horizontal and vertical sides separately because they may differ.

A phone photo without a scale reference can show the shape and regularity of the perforations, but it cannot prove an exact physical gauge. Use the photo result to narrow the possibilities, then verify the measurement before assigning a catalog variety.

How it works

Measure perforations with a real scale

Perforation gauge describes how many holes occur in a 2 cm span. A photo without a known scale cannot support an exact physical measurement.

Photograph every edge

Use a flat, sharp image with a contrasting background and no cropped perforations.

Add a calibrated count

Count holes across exactly 2 cm or photograph the stamp beside a properly aligned gauge.

Check both directions

Horizontal and vertical gauges may differ, creating a compound measurement such as 11 × 10½.

How to verify a perforation measurement

Accurate gauge work depends on a known scale, complete edges, and separate readings for each direction.

Use a reliable 2 cm reference

Place the stamp flat and align the center of the holes with a physical gauge. Do not stretch the reading to make it match a catalog entry.

Physical gauge or calibrated scan
No camera perspective distortion
Several holes aligned across the span

Measure both directions

Some stamps have compound perforations, such as a different horizontal and vertical gauge. Record the directions consistently.

Top or bottom edge for horizontal gauge
Left or right edge for vertical gauge
Irregular or damaged teeth noted separately

Use gauge as one clue

A matching gauge does not prove the issue on its own. Combine it with design, denomination, color, paper, watermark, overprint, and postal context.

Compare only plausible catalog issues
Check watermark and paper where relevant
Seek expert review for valuable varieties

Continue your research

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