If the loaves should finish baking at the same time, it's good if they're the same size. This is where a dough cutter comes into the picture. Use it to easily divide dough into equal pieces on the worktop.
Twin Cities Library of Things
https://twincitieslibraryofthings.myturn.com/library/
https://twincitieslibraryofthings.myturn.com/library/