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A 17-inch red-eared slider would probably hold the Guinness World Record for biggest red-eared slider turtle. A very large adult red-eared slider is a little over a foot long from the tip of the nose to the tip of the tail, with a shell around 8 to 9 inches long. A more average size (especially for males, which are generally smaller) is around 9 to 10 inches from nose to tail, with a 6 to 7 inch shell.

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15y ago

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