Epetlover24 Inch 4 Panels Pet Dog Gate, Foldable Z Shape Step Over Fence for Indoor Doorway Hall Stairs House, White

Q: Is each panel 24 high and 20 wide?

Yes. Very sturdy and looks nice.

Q: how do i fix the sides to the walls?

It is not designed to be attached. Unless it is fully unfolded, it stands alone. You could purchase hardware to attach it to the wall, I suppose. Consider purchasing a different fence, one that comes with such hardware.

Q: Are feet available to make it more sturdy?

I don’t think it comes with feet. But I have had no problem with it staying upright. I did purchase a size larger than what needed so that didn’t have to stretch it out. I’m pleased with gate.