how big

the pots you get roses in tend to be 3 litre mookins. so abou 12" tall by 9" diameter. I think a tomatoe pot is nearer 4-5 litres if that helps.

why?

I was going to order some plants and it only said the pot size not the plant size so if its a pot that size then the plant has to be a decent size really to be in it.
if that makes sense..... Im confusing myself
x x x

I order quite a lot of plants online Mookins and they either come as 9cm pots or 1 litre or 2 litre pots.

I had some come today, they were 2 litre pots and they measured 5.5" across and 5.5" depth.
The maximum price was £4 per plant which i thought was good.