I believe that Marks & Spencers carry big items,,Dorothy Perkins is affordable.
Topshop, Forever 21. In Jurong Point and Tiong Bahru ,they have a shop called Yoke Boutique...they sell up to 6XL.
You can also try Milady at Far East ..
www.milady.com.sg
Try the Singapore Expats Search Engine,,I think there was a topic about big clothes some time ago.
