They will likely almost double in size by the time they are done and ready to harvest. You can do some low stress training by pulling down the branches to even out the canopy and shorten them down a little bit without putting much stress on the plant. You can do this by drilling holes on your pot rim and tying them down to that.
Also check your light and make sure you are in the 650-800 PPFD range for light. You can download a PPFD app to check. This makes sure they are getting the right amount of light for flower and not stretching any more than usual to reach more light.
I hope this helps.