The first thing you find when growing with hydroponics is there is no soil involved. This in its self has a lot of benefits. You will not have to deal with soil born diseases and bugs that can grow when you use dirt to grow with.
There are many different choices to choose from when you grow with hydroponics. They can be a small as you want or a full blown farm there is no limit.
What you will find when you research the subject of hydroponics is that plants and the containers they can be grown in come in many sizes. There is no set law as to what size container you have to use when you grow with hydroponics.