Question
Hi there! Thank you for taking the time to answer these questions. I've always wanted to learn how to grow my own food, so I would like to begin with something small, like herbs in containers. I have to use containers as I have no land to plant growing things in.  I've been working with ceramic clay for the past few years and would like to make my own containers to begin growing herbs in. So the questions that I have are these :  Is there a standard height that I should build my pots to allow for plenty of room for root growth? I intend to glaze all the interiors and plan to have drainage holes. Also plan to have wide openings for ease of planting and watering. So yep, the question centers around size of containers,  for herbs....4 inches, 6 or 8? Wasn't sure if anything could grow in a container that was 6 inches in length but only 1 or 2 inches in depth. Thanks again for taking the time to read and answer. Have a great day!

Answer
The size of the pot depends what you plan to grow.  Mint can easily fill a very large pot (Mine are 14" in diameter).  Bay trees, lemongrass and some other larger herbs would need larger pots. I would recommend that the pots be about 8" deep or more but again, it depend what you will be growing.

If your pots are glazed on the outside there is no need to glaze on the inside. Make sure any glaze (especially if it is on the inside) does not contain anything harmful which could be ingested by you when you eat the herb such as metals.
I grow Aloe in an unglazed pot because I want water to be able to evaporate through the sides of the pot.
Do not cover the drainage holes with rocks.  The best way to help drainage is just use a good quality potting soil or potting mix. If you are concerned about soil coming out of the bottom of the pot cover the drainage hole with a coffee filter, fabric interfacing, or landscape fabric to allow water to drain without letting soil escape.