From Edge of Darkness Wiki
Creatures & People
Base Value: 5 (adult human)
A character's Size is relative to his species (human) and age. The average adult human's Size is 5. A child's is 3. Size is one of the two component values used to determine your character's Health dots (see above), reflecting her overall capacity to withstand damage. Generally, your character's Size does not change unless she undergoes some strange supernatural transformation. Here are some sample Sizes for various creatures (more species size factors can be found in the Bestiary).
Objects smaller than Size 1 can fit entirely in one's palm; they have negligible Size.
|Size||Creature||Objects||Mage Instant Spell Penalty||Size|
|1||Human infant (up to 1 year old)||Pistol||0||20 or less|
|3||Human child (5 to 7 years old)||-4||31-40|
|10||2-seat sports car|