Are Offset Closet Flanges Efficient Or Trouble?

[Reach4]

I expect that ring to be less than 3/8. I am confident that there would not be an interference fit with the toilet.

If you order one, how about you take dimensions, and post those.

 

[PGB1]

Thanks Reach4. Good idea about posting measurements. If that's the item to be used, I'll be sure to post a dimension sketch.