I voted 11 litre.
For me - that would be enough pot space to see an auto through to it's maximum potential. (as in if everything goes perfectly with the feeding, environment etc etc)
here's a comparison between a 10 litre and maybe 1 or 1.5 litres worth of medium.
(.... the difference when it doesn't all go to plan lol )
Same strain - same light, same coco, same feed, same time.
![]()
hope this helps with your decision ^_^