Size and size modifiers are merely how large a creature is and how much space they take up. CHASE uses the same system as other games, but takes it to a logical extreme, for extraneous purposes.
A creature's size denotes how much space they take up. This does not necessarily mean their exact height, weight, mass, or other realistic factors, it simply a guideline on how a creature fits into the world based on how big they are.
Categories of Size
There are eight main categories of size players and GMs should be familiar with. In order: Tiny, Small, Medium, Large, Huge, Colossal, Gargantuan, and Titanic.
Tiny
A small object or creature, about the size something that can fit into or on a Medium sized creature's hand. Seldom takes up a 5x5 square/cube, and is often lumped into such with other Tiny to Medium entities.
Small
A below averagely sized entity. Fits in a 5x5 ft square/cube, despite being less than that more oft than not.
Medium
Base standard for almost everything. Usually takes up a 5x5 ft square/cube (1 square).
Large
Above Average height, often larger than or large enough to fit a Medium sized creature. 10x10 ft square/cubes (2x2 squares).
Huge
The Huge. Often the size of trees or most small hills. 20x20 ft square/cubes (4x4 squares).
Gargantuan
Larger than huge, obviously. The size of most small buildings, such as sheds, shacks, flats. 40x40 ft square/cubes (8x8 squares).
Colossal
The classic biggest set of entities, with the size to match. The size of the tallest medieval buildings or, just under half the size of some plots of land (such as an acre). 80x80 ft square/cubes (16x16 squares).
Titanic
The tallest of giants, the oldest and dragons, and the greatest of creatures. Titanic sized entities are often larger than most small buildings by a large margin, or being as large as some plots of land. Still not as large as City Blocks, but still a sizable chunk. 160x160 ft square/cube (32x32 squares).
Most creatures, including player characters, will start the game as either Small, Medium, or (on occasion) Large. These sizes seldom change, unless something alters such (such as an ability or a Feat/ure).
Changes in Size
Some effects can change a creature's size, making them bigger or smaller depending on what the effect. Each time a creature increases in size by a category, multiple their weight by 8. You divide that number by 8 if they shrink. Other factors change (or don't change), listed below.
Attributes
An entity's attributes will not change. That will usually be handled with the effect that alter's their size, due to the different purposes as to what and why they change. This also includes damage.
A creature's carry capacity doubles or is halved by each size category they have, using Medium as a base. This really only affects player characters.
Defenes
A creature's defenses will change based on their size. Smaller creatures gain +2 their AC per size category below Medium. Larger creatures gain +2 Damage reduction from everything (plus their Character level or threat level) from everything.
Space
A creature's space can never fall below 5x5, unless there is a grid standard for such in game (in which case, use the closest approximation).
Movement
Creatures who shrink in size reduce their Max movement a turn by 5 ft per size category. Creatures who grow in size double their max movement per category. This does not include a creature's base size or movement, so anything in the Bestiary that starts off at a non-Medium size (such as a
Fanged Wolf), their Movement is not altered.
Reach
Increasing or Decreasing size does change or affect a creature's attack range. This is due the change in a creature's Max Movement
Beyond Titanic
If, for whatever reason, there needs to be a classification of things beyond Titanic, the process (and scaling) just begin again. After Titanic, there's Titanic (Tiny), doubling the size and factors for things accordingly (weight multiplies by a factor of 8, carrying capacity is doubled, etc). This continues into Titanic (Small), Titanic (Medium), Titanic (Large), so on and so forth.
Beyond Titanic proper is Mega, then Giga, then Tera, Exa, and Macro. After Macro, you begin again Mega (MacroMega), MacroGiga, MecroTera, etc. There is likely something bigger than that, but that is beyond the purview of this game.
The extra size categories are inspired by Craig Conchrane's Immortals Handbook, Acension (
here) and their Immortals Handbook Beastiary (
here). Nothing else from the book is used, but the extra sizing is nice.
