Model-year compatable

I did an online search with (http://www.car-parts.com) a database of all parts yards national,local,etc. the search gave me a list of recyclers in my erea to call. to make a long story short,the glass they sold me don't seem to be the right one! from Buick Century.....I have installed many door glass in my years,so I am 99.9% sure it's too big for my car.