But how am I supposed to know which ones you prefer? Make a picture like the first 2 posts and stop discussing. I just want to know how will you draw general ellipses of the desired size. End. Dot.
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The reason we're discussing is because we are confused by this, it feels like a weird thing to be fixating on when there are better avenues for improvement and the goal is still somewhat unclear. Are you trying to figure out anti-aliasing? are you trying to see how other people approach... a basic shape?
There's only going to be maybe three or four highly-situational ways to do what you've described here, and doing it serves no real purpose except as an incredibly basic practice gesture that would likely be better spent just doing a whole drawing.
It's confusing.
Like eishiya said, it's the context of the shape you work from.
That's not a basic shape, it's a square-root based shape. Also the picture below shows various pictures of different fake "users" making circles from 1x1 to 6x6, which is what I would like to see from users if it was just circles 1x1 to 6x6:

Image 1 and image 2 were made by one user, but in one post. Image 3 was made by another user who prefers circles with less pixels. Image 4 was made by some person who likes anti-aliasing. Image 5 was the same idea as Image 3 - that's valid. Copying it is also valid. Image 6 was made by person who cares about area and not symmetry. So I suggest you to make an image like the one of beginning to check which type of circle you like.
Look at this image:

Your task is, in the places of my ellipses, draw your ellipses instead, and use your own title in place of my one.