Here are a few key points to consider when purchasing apparel online:

1. It is important to be aware of your measurements when purchasing items online.  Unfortunately, there is no universal fit that manufacturers follow. 

2. Be sure to buy from Ebay Store owners who take the time to list exact measurements of each item.  Beware of sites that give measurement guidelines rather than specific measurements of the item.

3.  Don't worry about size labels.  Focus more on the fit, rather than the label.  For example, if you need 48 inches in the bust- be sure to buy the size that fits that measurement.  You may need to purchase a 3X even though you typically wear a 1X.