Boiled turkey labeled as 2-6 may refer to different products. It is important to know exactly what is being referred to.
If this is the portion size, it may depend on the age and breed of the turkey, as well as individual preferences.
If, however, this is the size of a whole carcass, it may refer to turkeys that were specifically bred for sale in stores. In that case, the 2-6 size may be the average size of a whole turkey carcass.
In any case, to obtain more precise information about the product, it is recommended to consult an official source, such as the manufacturer's website or the information on the product packaging.