There shouldn't be more than two dozen Christmas cards left to write.
Pack the shirts in dozens, please.
(as plural only, always followed by of) A large, unspecifiednumber of, comfortably estimated in small multiples of twelve, thus generally implied to be significantly more than ten or twelve, but less than perhaps one or two hundred; many.
There must have been dozens of examples just on the first page.
There were dozens and dozens of applicants before the job was posted.
Although there are dozens of different types of gems, among the best known and most important are diamond, ruby and sapphire, emerald and other gem forms of the mineral beryl, chrysoberyl, tanzanite, tsavorite, topaz and jade.