have to b the same size? sorry its my 1st car lol 99 a4

 

Are you asking if the new blade needs to be the same size as the old one? If so, yes and no. If you go with a bigger size it'll go off of the windshield, and won't work. A smaller size will work, but won't hit the whole windshield. They're all about the same price, but might be different by $1.