Thinkin about gettin chrome tips for my stock muffler

So what size should I be looking for?

try these- i have seen several gp's with these on them and they look great. i have also heard that you can use the chrome tips from off of a firebird.

http://www.pfyc.com/store/merchant.mv?Screen=PROD&Store_Code=PFYC&Product_Code=GN5003&Product_Count=9&Category_Code=GPEXH

stock gt/gtp is 2 1/4 at the mufflers... i duno what se's are