[WingsToDiscovery]

To be honest, style and fashion just aren't designed for "large" people. When companies enter a market to sell their clothing, they immediately target the small-average range. You will find niche companies who design larger clothing, but like I said, they're niche companies operating in a larger market, no pun intended.
This is not to say that larger people can't wear certain styles, however, many times they have to alter the styles to make them more flattering. Extremely thin girls have a hard time as well, but it's easier to dress a thin girl than a large girl when pertaining to high fashion.