What I love about shopping in America is that stores offer clearance sale with the most marked down prices of clothing, baby stuff and in almost everything. Aside from that, they do sell several sizes of clothing for adults from double zeros to double extra large. If you are petite then you look your size at a petite or junior's section of the store or when shopping online, you'll click on the page that says petite. People have different body type and built, different sizes as well so do the dresses.
I am glad to know that shoppers can just shop for the size that fits them. Like the one I know in other states, two of them are plus sizes so I told them to shop for plus size dresses because that surely would fit them right.
While back in the Philippines, if you are a little bit chubby, therefore you are a bit different than everybody else. Because the normal sizes there are from XS to Large. You cannot guarantee it will be easy for you to shop for your clothing because stores there won't normally sell plus sizes.