what size pots for sog grow

sup guys im doing a sog grow of hashberry,some og kush clones, and some very dank whiterussian X whiterhino cross clones...im growing some of these out to be mother plants...anyways i wanted to know what size container i could use on for the clones that i will take out of these mother plants...im doing a soil based sog grow and my growing space is 3 feet area about 6 feet high i was planning to use square 5x5 inch pots...i was thinking of cramming as many clones as i could in the space,,,so do you think i could use this size or should i get bigger size pots?

one gallon for every foot of plant

if you plan no veg time (using clones) a gallon should do you.