Where is it on a ruler?

Pick a length. The page marks that line in blue and says how far it is from zero. The left ruler stays fixed.

Centimetres

Millimetres

Inches

Make the ruler true to size

A browser cannot read how many centimetres your screen is. The first scale is an estimate. When the frame matches a bank card, the marks become real length on this display.

Line up the long edge of the card with the width of the frame. The height is only a visual ratio.

ID-1 card