Here's my last 2x2 autoflower grow thread, got almost 3 ounces from 2 plants in 16oz containers. Good luck, for a recreational connoisseur grow it's plenty of space to be self-sufficient if you can be around to water daily.
https://www.autoflower.org/threads/low_and_slow-coco-micro-grow-16oz-container-comp-entry.24724/
https://www.autoflower.org/threads/low_and_slow-coco-micro-grow-16oz-container-comp-entry.24724/