The Collaborative International Dictionary of English v.0.48:

Toise \Toise\ (toiz), n. [F., fr. LL. tesa, fr. L. tensus, fem.
   tensa, p. p. of tendere to stretch, extend. See Tense, a.]
   An old measure of length in France, containing six French
   feet, or about 6.3946 French feet.
   [1913 Webster]