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Nature

How long is a common pill bug?

An adult common pill bug has a body length of about 1.2 cm (0.47 in).

What is measured: adult body length

Common pill bug (1.2 cm) drawn to scale beside a grain of rice (7 mm) and a large coin (2.4 cm)
Drawn to scale, from left to right: Grain of rice (7 mm), Common pill bug (1.2 cm) and Large coin (2.4 cm).

Compare

How big is that, really?

  • About 1.7× as long as a grain of rice
  • About 2 would fit across a large coin
  • About 7 would fit end to end along a credit card
  • About 6× the width of a raindrop
  • About 24× the width of a grain of sand

Learn

Facts about Common pill bug

The common pill bug is a terrestrial crustacean that can roll into a ball when threatened.

Source: Encyclopaedia Britannica, woodlouse

Nature

NameSizeCompared with Common pill bug
Common pill bug1.2 cm (0.47 in)this page
Gippsland giant earthworm2 cm (0.79 in)1.7×
Bargibant’s seahorse2.4 cm (0.94 in)2×
Blue dragon sea slug3 cm (1.18 in)2.5×
Garden snail3 cm (1.18 in)2.5×
Bee hummingbird5.5 cm (2.17 in)4.6×
Monarch butterfly9.5 cm (3.74 in)7.9×
Luna moth11.5 cm (4.53 in)9.6×
Venus flytrap15 cm (5.91 in)13×
Pygmy marmoset15 cm (5.91 in)13×

Test your sense of scale

Which is bigger: Common pill bug or Gippsland giant earthworm?

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