How big are flea eggs?

Picture of a cat flea egg on finger. Humans can see flea eggs.

Denni Schnapp

Img 1 Cat flea eggs on the tip of a human finger.

Summary

Cat flea eggs are 0.5 millimeters long, and 0.3 millimeters wide. Though tiny, they’re still big enough to be visible to the unaided eye.

Details

Flea Eggs Size

Eggs of the cat flea, Ctenocephalides felis, are very small. They measure approximately 0.5 millimeters in length, and 0.3 millimeters in width. Though minuscule in size, they’re still large enough to be seen by the human eye.

Size Comparisons

For comparison, the tip of a sharp #2 pencil is approximately 1 mm, some mechanical pencils have 0.5 mm lead, and a grain of table salt is around 0.3 x 0.3 mm. Consequently, the white eggs are often described as looking like grains of salt.

illustration of cat flea egg size

FleaScience

Img 2 Size of a cat flea egg compared to the tip of a sharp #2 pencil (1 mm).

References

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  • Claudia Arnold May 13, 2019, 8:42 pm

    I am infested with fleas. I am also highly allergic to the bites. They have been battling this for 5 years. Drs. Have not been able to eliminate them. Dermatologists do not want to treat.
    Suggest psychological issues. They reproduce on my body,in my hair,my digestive system,urinary tract,ears,nose,eyes. I’ve tried everything.
    My hair has fallen out, I have no hair on fingers,hands,feet,toes. The itching is so intense that I take 15 zyrtec per day. I’m afraid of what that has done to me. Human flea infestation is a problem for thousands, all frustrated because they can not find medical treatment. I’ve researched this for 5 years. I’ve documented the life cycle from my body. They feed off my blood,hatch eggs that jump right to the next place to begin another cycle…please comment.

    • Adam Retzer June 9, 2019, 1:57 pm

      Claudia, fleas don’t reproduce in people’s or animal’s bodies. This sounds like something unrelated to fleas. I’d recommend having a pest control specialist come take a look in person, or an entomologist, and then they can identify the pest and prescribe a remedy.

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