How Big Do Bedbugs Get

The average adult bed bug size ranges from 1/4 to 3/16 of an inch in length. Their flat, wide bodies look significantly bigger after they’ve taken a blood meal, so a bed bug’s actual size varies depending on whether the pests have fed. Once engorged, the pest’s body expands into a longer, more cylindrical shape.

How big is a fully grown bed bug?

Adult bed bugs, in general, are: about the size of an apple seed (5-7 mm or 3/16 – 1/4 inch long); long and brown, with a flat, oval-shaped body (if not fed recently); balloon-like, reddish-brown, and more elongated (if fed recently);

Are bed bugs visible to the eye?

They are visible to the naked eye. Adult bed bugs are usually brown in colour. When filled with blood, their colour ranges from red to dark brown. They are oval in shape and about the size of a flattened apple seed, 4 to 7 mm in length.