The most popular sizes for pans in breadmaker machines are 1 pound, 1.5 pounds, 2 pounds, 2.5 pounds and 3 pounds. The size of the pan refers to the weight of the loaf.
Many breadmaking machines offer more than one loaf size option. BreadMachineDigest.com in 2016 states that 1 pound and 2.5 pound pans are hard to find. According to About.com, in 2016, 1.5 pound bread pans serve a family of two to four. Pans larger than 1.5 pounds serve larger parties and accommodate a greater variety of recipes. Pan size does not refer to shape, and pans come in many shapes in each size.