Clones and pots question +rep. for help

I am growing some WW and AK47 and am planning on cloning... I am looking to flower my clones almost immediately after they root...maybe let them grow for 2 - 4 weeks...not sure. How big pots should I buy? I want to have as many as possible flowering in 4-6 feet space so I dont want anything too big but not too small either...would 6.25x6.25x8" be too small? Thank you in advance!

used one gallon milk jugs for the same purpose and i didnt have a problem

If your only going to veg them for a month then gallon containers should be fine. If they are getting over 18 inches tall then you need 3 gallon containers.

Thank you so much for advice!!! +rep to all of you...NoDrama I cant give you +rep the comp sais I gave you too much reps already so you will have to wait but I love your posts!!! Thanks again.