Audio Systems: speaker, car link, size 4t

Question
Hi;
  I have a question in regards to speaker sizing on mine '88 beretta. The front dash mount speakers are,i heard a size 4T, what size is that? No one sells 4T but regular 4 inch,are regular 4 inchers a good fit or not?
        
                                  Thanks
                                   Tom s.

Answer
Tom ,

 i have never heard of 4T ? unless it is a GM size code or something but none the less .. if you want to know the exact size go to crutchfield.com and use the "what fits my car" link this will tell you everything you need to know .. now i dont recommend buy from crutchfield just because you can buy cheaper elsewhere but they do provide awesome support ! .. also check out etronics.com that is where i buy all of my components .. hope this helps you out if you need anything else let me know

thanks