Chatuchak has the biggest variety and the most eclectic range I’ve ever seen. If you’re not a fan of marketplaces, or bustling crowds then best avoid, because this place is about the size of a suburb. Beware of the food, it’s either incredibly expensive and a tourist trap, or insanely cheap and questionable. It’s only open on weekends and it’s quite easy to get to.
You’ll find everything in there. Woodcraft, traditional dress, handicrafts, pets like kittens and ferrets, glassworks, incense, art, tshirts. Everything. I did all of my shopping for family and friends back home whilst there. You can haggle down to a reasonably cheap price too, especially because there are probably several shops that have what you’re after. If you go with someone, make sure you have a mobile or a meeting place outside of the markets, like the entrance to the train station for example, because the markets themselves are an absolute maze, and you probably won’t pass the same stall twice. Also, ensure that any clothing bought from there is washed before use- it’s a marketplace, so no promising cleanliness. That said, you’ll find some real gems. We found a signed band t-shirt dirt cheap, so spend a full day there. Keep hydrated!