Loaf size?

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Stupid question; but when people talk about a "500 gram loaf" or a banneton is listed as being for an "800 gram" loaf, is that referring to pre-baked dough weight, flour only weight, or post-baked weight loaf??

Usually everyone here is talking about the dough. Adding up the weight of all the ingredients. For a banneton it would always be talking about the dough because only dough goes into a banneton. 

However if a baker sells you a 500g loaf they're talking about the final product so they have to take into account loss through baking. 

This is the origin of a bakers dozen = 13. Baked goods lose weight so they throw in an extra item to make up for that loss.