hi jl,
if u r toking abt buying clothes from the boutiques n dept stores.... the price is almost the same as spore.
unless if u wanna buy from siam sq, mbk, chat market, etc.... usually comes in free sizes for tops. usually not convenient to try on bottoms unless if they r the small shops in siam sq or mbk.
sometimes along the linkway at siam sq, there r some ppl who sell some clothes (those place on floor mats one) same design as those in siam sq but abt half the price only.
i was recommended by a local the other time to check out baiyoke garment centre/ tower. that is a wholesale centre, i heard. i din hv time to go during the prev trip so this time die die must go! cheap but u hv to purchase at least half a dozen. i heard from a fren tat she bought half a dozen, but managed to negotiate for diff colours n designs. same applies for shoes as well.