Which preposition to use with rotundity

of Occurrences 22%

There was a monogram of silk on his shirt-sleeve, of gold on his bill-folder, and of diamonds on the black band across the slight rotundity of his waistcoat.

by Occurrences 1%

[Illustration: NO. 26] That amiable type of woman formed conspicuously upon the circular plan often unconsciously impresses the fact of her fatal tendency to rotundity by repeating the roundness of her globular eyes, the disk-like appearance of her snub nose and the circle of her round mouth, and the fulness of her face by wearing a little, round hat in the style portrayed by No. 26.

in Occurrences 1%

A shade more of leanness in the legs, one jot less of rotundity in the breastwhat misery might not these seemingly trivial incidents have created?

out Occurrences 1%

Look at him, with his hair powdered and fattened down to the head; behold him as the bell rings, using his arms as levers to force his rotundity out of its case; then observe the pedestals on which he endeavours to walk; one might imagine he had been tapped for the dropsy half-a-dozen times, and that all the water had run into the calves of his legs.

than Occurrences 1%

It was more like an elephant in bulk and rotundity than any other creature.

with Occurrences 1%

I am sure we must shrink from the original rotundity with which Nature blessed us.

Which preposition to use with  rotundity