The largest balers make bales nearly 8 ft. wide by 6 ft. in diameter. Bale weights vary from 500 lbs. Balers with a variable chamber produce uniform density bales in any diameter up to full size. Fixed chamber balers will not produce a maximum density bale until it reaches full size. Modern large round balers are available with an assortment of options.
Twine tie is available on almost all balers.
An automatic twine wrap feature speeds wrapping. Some companies offer a system which automatically guides the baler across windrows to produce uniformly-shaped bales. Some balers eject the bale and close the tailgate without backing up the baler. Recently, models have been introduced which contain two bale chambers. This arrangement allows a new bale to be started while a full bale is wrapped with twine and ejected, all without stopping forward travel.