Oval?

Yes, agree with oval.

There are not a lot of oval options unfortunately  :(

I would use a square or round one the approximate size of this ottoman:

If you look up your set, you can see what others have used.

For example, this one ….I think the scale is off:

Rectangle, I like this size:

But … those are just my opinions without knowing more. It’s hard to say for sure without knowing what your needs are (function), your decor style, the room dimensions, etc. It all factors in for the best decision.

Thanks :) That's kind of what I did but there are not a ton of photos out there of our sofa. The one on top def looks best, that is shown with the ottoman that is part of the collection and I actually already looked and it's 40x40. I didn't but it because I know our feet would destroy it and would rather have a different surface but I guess I can try and find something close.

You could tape off various sizes on the floor, or use cardboard/etc, to get an idea, too.

Rectangle and follow the advice.