Hi Shirley
Option 1 :
===========
Take taxi to Pratunam Market, Pratunam Market have many stalls along the streets very hot and sticky maze. Beware many pickpockets there too.
Option 2 :
----------
You can tell the taxi driver you want to go Baiyoke Suite hotel or the Thai people call it Baiyoke one hotel.
That building has many clothing but is messy. They are wholesaler. Correct as what Vonn had mentioned before is like City Plaza in Sin or "Lai Chi Kok" wholesale in Hongkong. Not easy for you to decide what to buy if you are not a fashion merchandiser.
Option 3 :
==========
I suggest you to go to the newly open building
"Indra Plaza". This building is also wholesaler & retail most important is tidy and clean. Just next to "Indra Regent hotel" These are much cheaper shop you can find. Just 2min walk from Baiyoke Suites hotel.
Option 4 :
==========
Another place to shop is opposite "MBK" Siam Square near Novetel hotel.There are many small shop by some Thailand young designer...cool and unique. From clothes,shoes,bags,and accessory etc... If you are looking for clothing like those selling at "Fast East Plaza" or "Heeren" that's is the best place to shop. Is a happening place on sat like our orchard road. At least you can see people dressed up in Bangkok. Remember those shop close as early at 8pm. Some of the shops are selling pretty expensive stuff but very nice. No matter what it is still cheaper than Sin.
Option 5 :
==========
Go chatuchak weekend market. Most of the fashion buyers bought their stuff there.
For clothing and Accessories go to
(section 5, 6, 10, 12, 14, 16, 18, 20, 21, 23)
Plan before you walk if not "merry go round" and end up nothing to buy. Lastly, if you are getting more than 3 items from one shop you can ask for wholesale price. The cheapest place to shop.
Hope this info help some shoppers as well.