21mm or 23mm front sway bar bushing??

I'm going to have my shocks/struts done soon and I'd like to have the front sway bar bushings replaced as well. I'm collecting all the parts now. Which bushing applies to my car, 21mm or 23mm? I can't tell by looking and I'm not sure what to buy.

Thanks for the help.

Probably the 23mm. I do occasionally see a 21mm bar, but not on an 03, IIRC.

Thanks!