Since you give no details. You could just measure your bar; Wrap a piece of string around it and measure the length then remember high school geometry.
As stated earlier it is either 25 MM or 23 MM. a tiny bit smaller than 1 inch.

 

your front sway bar is 25 mm , not 1 inch not 24 mm , 25 mm.

 

Old blue yes this is correct 25 mm given the fact that the conversión from 1 in to mm is slightly different.

My assumption is that since non OEM it is not the most adequate and I will have to buy the AC Delco ones .

 

I’ve tried the 1” poly bushings from energy suspension and they were loose made noise, I tried Moog , to small in the bracket, I went back to AC Delco, you get 2 for under $10.00



Note that is just $7.20 CDN funds! For those AC Delco bushings, clean the bar of any dirt and grease, install them clean , no grease! With the split facing to the rear of the car.