Got the wrong MAP sensor
 

I ordered a part online for the first time ever, and it's not even close.

Any ideas?

Some details about your vehicle are needed here. Year/model/engine size/ etc.

Also, where did you order it from? What is their return policy? Etc.

Since you posted in the Sebring forum, I presume yours is a Sebring. Sebring coupes and Sebring sedans/convertibles are VERY different automobiles. If you don't specify which you have and they send you a part for the other car, it ain't gonna fit.
Coupes were built by Mitsubishi. Sedans/convertibles were built by Chrysler. They have almost no parts in common.