A 32oz cup is about double the size of my 4 inch pots. I would start smaller and pot up to these.smileyguy697 said:I know a lot of you guys use solo cups but has anyone ever used the 32oz plastic cups from a gas station or Micky D's? I figure you could get a bigger root ball that way but there has to be a downfall somewhere or people would be using them. I ask this because I have a friend at the gas station that said i could get a couple sleaves for store cost.