Analysis of You said that I

You said that I "was Great"—one Day—
Then "Great" it be—if that please Thee—
Or Small—or any size at all—
Nay—I'm the size suit Thee—

Tall—like the Stag—would that?
Or lower—like the Wren—
Or other heights of Other Ones
I've seen?

Tell which—it's dull to guess—
And I must be Rhinoceros
Or Mouse—
At once—for Thee—

So say—if Queen it be—
Or Page—please Thee—
I'm that—or nought—
Or other thing—if other thing there be—
With just this Stipulus—
I suit Thee—