Pot shapes and sizes?

No and no. Pot shape has absolutely no bearing on plant size. There is nothing in the root system that can "signal" a plant that it is growing in a square, round, triangle, oval (or whatever) shaped pot. Pot size definitely does, the bigger the pot, the more roots. The more roots, the more plant! Pot shape has nothing to do with plant size or yield potential. Pot size does. Cheers, Organoman.

Not particularly. Size and ability to get oxygen to the roots are really what’s most important. The plants specific shape tends to relay both on the strains genetics and your own pruning methods ( lst, hst, topping ect) Hope this helps! And happy growing 🌱