Theory of Electron String: Vibration, Parameters & Length

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Does the theory say that an electron is a single vibrating string? How many parameters are needed to describe that string? Does the theory say how long the string is?
 
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In string theory, the electron is a single vibrating string. The length of the string is roughly the Planck length, or 10-35 m. The only parameter of the free string is its tension, which is related to its length.
 
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