This is what I planted: https://www.rareseeds.com/bok-choy-hedou-tiny
It does not grow big at all. I can take pics of what I have in the fridge. lol It was starting to flower already. Mine from last year did get bigger in the garden bed; but it wasn't as cramped a space as the pot I used.
Thanks. Looks like the seeds I just bought. Dear Wife likes to toss the Baby Bok-Choy in her native soups, but sometimes she just steams them or tosses them in a stir fry. I love them any way they are cooked - or not - as you can also eat them raw in salads.