Magnitude 1:
Genial, non-threatening, and highly adorable. Often accompanied by hawaiian shirts and enthusiastic waves. Only one row of teeth is visible. Observer may feel protective and warm towards the smiler.

Magnitude 2:
Upper and lower teeth are shown and cheeks begin to puff up and redden. Observer may feel smiler’s joy suffusing his or her own breast.

Magnitude 3:
Nose-wrinkling and eye-crinkling are clear features of this level of magnitude, which is correlated to the procurement of giant boxes of grape juice. At this point the smile is so consuming that the smiler cannot sustain a standing position and must be seated with knees bent and feet tucked under the body. Observer may begin to worry that smiler’s face is at risk of cracking.

Magnitude 4:
Rarely seen, this is the highest level of magnitude on the scale. Nose-wrinkling and eye-crinkling continue, now taking on a slightly diabolical aspect which may trigger feelings of nervousness in the observer. Hands are stretched out in a grabbing motion, as if the smiler seeks to draw bystanders into a frenzy of excitement.