"A square bail of hay, tightly packed, weighs about 35-40 pounds. A square bail is about 48 inches long, 24 inches high and 24 inches wide. So, basically, that kid had 2 1/2 bails of weed."
So stacked on top of each other...that's roughly 6 feet tall, 4 feet long and 2 feet wide of drugs. The pic below is an attempt to show what Reuben's payload might have looked like.
It isn't exactly to scale but the part in white will give you an idea of how much weed that Reuben alledgely attempted to obtain for $60,000. I put Reuben in the pic to give some semblance of scale to the pic.