2005 GP GT

I have a little clunking noise when it hit small bumps and while inspecting I noticed I have a gap through my stabilizer bar bushing. I need to replace them but when looking online I noticed they had 3 different sizes to choose from but i'm not sure what size I need. I'm looking this up on rockauto.com and it shows size "Front To Frame,.80", 1.26", & 1.34" Sway Bar Diameter.