A party ring biscuit is 29 calories. I've started using this fact to curb my gluttony. For example, the pulled pork wrap I just had was around 11 party rings, which is on the upper end of acceptable. However, the frozen pizza I was considering having for dinner tonight is a whopping 40 party rings, and that's clearly far too much food.

See also: http://en.m.wikipedia.org/wiki/Banana_equivalent_dose