Five millimeters (5 mm) is a very small measurement. To give you a visual idea:
In everyday objects:
– It is about the thickness of five stacked sheets of paper.
– Slightly smaller than the width of a standard pencil eraser.
– Roughly the thickness of a smartphone charging cable.
On a ruler:
– Look at the metric side (marked in millimeters) of a ruler or tape measure. Each small line represents 1 mm. Five lines make 5 mm, which is half a centimeter (0.5 cm).