Tuber yield of plants from three sizes of in vitro produced microtubers were compared to yields of plants from three sizes of greenhouse produced minitubers of Nicola and Russet Burbank. Microtubers were: small-size, 0.2-1.5 g; mid-size, 1.5-3.0 g; and large-size, >3.0 g. , and small-size minitubers gave the lowest tuber number, 409,375 tubers/ha −1. Regarding tuber yield, the type of tuber did not influence either cultivar. Nicola was influenced neither by type nor by size of tubers. Russet Burbank, however, was sensitive to size of tubers, especially, within minitubers. Large-size mini and microtubers were the most productive, 49 and 40 t ha −1