User blog comment:BastionMonk/No feathers in JPIV/@comment-11047508-20130414085716/@comment-1791057-20130615021628

Spinosaurus was more along the lines of 55ft average maximum, but Dal Sasso messed up the calculations in his paper, which is the only paper that has ever been published that reports Spinosaurus dimensions with such a size. Most paleontologists place Spinosaurus between 45ft and 55ft, which still makes it the largest theropod, but at a much mroe realistic size