I googled "miniature round bale" and saw this:
http://smallfarminnovations.com/compactroundbalers.html
Don't know what is meant by easy to move manually a 250 to 500 pound bale.
Bale weight can range from 250 to 500 lbs depending on density and moisture content. Bales can be easily moved manually. Bales keep their density, the tying system is quick and it allows you to double tie if you prefer. Uses the same twine as all other balers sold in the USA.
The hitch swivels in front of the baler so you can bale in areas where maneuverability is limited.
The horse power required is 18 to 45
Here's one that makes a 20 X 28 inch bale:
thank you very much for your advices and especially djinwa for a web site. these bales will be secure in the enclosed barn away from the sun. i am hoping to look for enclosed white plastic round bales so that the hay does not loose it's protein. i am hoping that NH, John Deere, or Kubota will make small mini round bales for small farmers like their compact or mid-size utility tractors. with today languished economy, i am hoping that they would be smart to capture small to medium farmers that are not full-time but part-time.
usually, market dictates itself, and if innovation does not improve with today demands of cutting costs these manufactures will not last long. uscangus
http:s//www.agriquip.com/star/mrb.html