Here is a link to the dimension.
I'm going to need a lot of bales of cotton. I figure somewhere in the neighborhood of 300 or more. They will be needed for the gin, for the dock, for loads in cars and some for the mill. Maybe a few others here and there.
For this many we'll need to mass produce them. Probably resin or hyrdocal castings.
Model Tech Studios has some, but they don't look very real.
I forgot to check Model Railroader Magazine but E. L. Moore actually did an article on building a ginnery. I ordered a copy of the plans from the NMRA Kalmbach Library today, so I should have it by Friday. They are VERY good!