Halley says so:

It IS about size — the size of the guy’s heart who happens to own that penis. It’s about the size of everything attached to that penis. The size of his kindness … and big big kindness matters. The size of the time he carves out of his life for you … and all of us find it harder and harder to drop everything and give a nice big full morning, afternoon or evening to the ones we love. The size of his laughter. The size of his eyes. The way they look at you, across a larged-sized room. The size of his courage.