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SESK: Stuff Everyone Should Know · sesk.info/reptile-red-eared-slider-size

About how big does an adult red-eared slider get?

About 5 to 11 inches long.

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  1. About 5 to 11 inches long ✔
  2. About 1 to 2 inches long
  3. About 3 feet long

Why: California wildlife officials say adult red-eared sliders range from about 5 to 11 inches. Plan for the adult turtle's space and care needs before bringing home a small juvenile.

Huh, didn't know that: In slider turtles, females grow larger than males.

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What is a turtle's favorite playground ride? The slider.
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References

Answer: About 5 to 11 inches long. California wildlife officials say adult red-eared sliders range from about 5 to 11 inches. Plan for the adult turtle's space and care needs before bringing home a small juvenile.

  1. California's Invaders: Red-Eared Slider (California Department of Fish and Wildlife) wildlife.ca.gov/conservation/invasives/species/redeared-slider
    Adult red-eared sliders can range from approximately 5 to 11 inches in length.
    Checked 2026-10-11.
  2. California's Invaders: Red-Eared Slider (California Department of Fish and Wildlife) wildlife.ca.gov/conservation/invasives/species/redeared-slider
    Male sliders have thick tails, elongated front claws, and are usually smaller than females.
    Checked 2026-10-11.

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