D = (1/2) * g * t2, this formula shows the distance (D) that an object will cover in a given time (t) with the acceleration of gravity (g) being the only force applied to that object, in other words - Free Fall. As you can see, no mass or size whatsoever is involved in this formula. Having that said, a feather and a bowling ball should accelerate at the same rate when free-falling.
The following experiment is made in the world's largest vacuum chamber in NASA 19s Space Power Facility in Ohio. A feather and a bowling ball are simultaneously let to free-fall... Awesome video.