Size of Bed Bugs


Bed bugs, which are increasingly becoming a problem around the world, are parasitic insects that inhabit sheets, mattresses and furniture. The bugs spend their nights feasting on our blood, causing itching and blemishes. These creatures are extraordinarily small and difficult to spot, but they're far from microscopic.


  • The size of bed bugs varies greatly, but adults usually top out between 4 and 5 mm in length and 1.5 to 3 mm in width.The size of the bugs depends on how full they are. An engorged bed bug that's just finished a meal measures on the larger end of the scale.

Life Stages

  • The size of the bed bug increases throughout its life. The larvae are typically around 1.5 mm long and usually grow around 0.5 mm throughout each successive life cycle. Bed bugs undergo four nymphal stages. The bugs molt after each feeding, leading to their next stage of development until they become adults.

Gender Roles

  • The gender of the bed bug does not affect its size. Males and females reach similar proportions. The females, however, swell when they are ready to mate. This leads to confusion among males, which occasionally attempt to mate with other males that are engorged with blood.

Other Physical Features

  • Bed bugs are almost always light to dark brown in color, with a hint of red after they've been engorged with blood. They do not use pincers, but instead use two hollow tubes to pierce the skin of their host. They then inject a numbing agent and anticoagulant, and suck out the blood.

Related Searches


  • Photo Credit Brian Kersey/Getty Images News/Getty Images
Promoted By Zergnet


You May Also Like

  • What Do Baby Bed Bugs Look Like?

    Bedbugs (Cimex lectularius) are hardy little creatures that all but disappeared a generation ago in the United States because of DDT and...

  • What Is the Largest-Sized Bedbug?

    Bedbugs are parasitic insects that, according to the U.S. Armed Forces Pest Management Board, typically reach from 5 mm to 7 mm...

  • How to Kill Bedbugs in Plastic Mattress Covers

    Bed bugs can be a nasty problem for many people. The bugs infect not only beds, but linens, furniture, stuffed animals, floorboards...

  • How to Kill Bed Bugs Naturally

    Bed bugs were recorded in history as early as the 1600s. In the United States, the use of powerful pesticides has helped...

  • Differences Between Bedbugs & Chiggers

    Chiggers and bedbugs are insects with bites that can make life miserable. Although both insects feast on human blood, many key differences...

  • What is a Bed Bug?

    "Don't let the bed bugs bite!" Bed bugs' lack of prevalence in western, late 20th-century homes rendered this nighttime phrase virtually meaningless....

  • Bugs That Look Like Sesame Seeds

    Bugs of any shape or size tend to get your attention. When identifying bugs shaped like sesame seeds, there are a few...

Related Searches

Check It Out

22 DIY Ways to Update Your Home on a Small Budget

Is DIY in your DNA? Become part of our maker community.
Submit Your Work!