The exact measure of the Hexamilion, from sea to sea, was 3800 orgyiae, or toises, of six Greek feet, (Phranzes, l. i. c. 38), which would produce a Greek mile, still smaller than that of 660 French toises, which is assigned by D'Anville, as still in use in Turkey. Five miles are commonly reckoned for the breadth of the isthmus. See the Travels of Spon, Wheeler and Chandler.