SWADE Big And Small Races
With GM permission (and careful scrutiny), races of Size 4+ or or Size -2 and smaller may exist. See SWADE (p. 179) for more detail on Size and Scale.
Using Gear: Anyone has -2 to use gear that's one Scale off (e.g., a Small hero using a Normal weapon, or a Normal hero using a Small weapon), plus another -1 for each additional Scale. No one can wear armor or clothing that isn't fit for their Scale. This is considered a disadvantage for small and large races, as they live in a world of normal-sized folk. See below for custom gear costs and weights.
Your Size is Your Size: The Size value of a big or small race is not changed by Edges and Hindrances like Brawny, Obese, and Small. The individual character may be "fat for a Pixie," but only descriptively. For these abilities, read any Size modifier as a Toughness modifier instead.
Undersized Racial Abilities
With one exception, this section no longer needs to be house-ruled. See the Fantasy Companion (p. 8) for the new Diminutive positive racial ability.
House Rule: The cost of diminutive gear is not reduced. The difficulty of making gear effective at such a small scale offsets the need for fewer materials.
Oversized Racial Abilities
For custom gear, multiply both its cost and weight by 5× the "Weight" value on the table below. For example, a Size 5 character multiplies cost and weight of custom gear by 20.
Important Note: The Big racial ability is already included in these point values, since it is mandatory at these Sizes.
As of the 5/31/22 SWADE update, higher Scale gives additional Reach. Consider adding the Reach positive racial ability to customize this further. Realistically, human-shaped races of Size 3 or 4 would have Reach 1, with every Size past that adding another +1 Reach.
Large race costs are loosely based on those in Summoner's Circle, adding things like Big and Reach to those base values. However, extra Wounds have been priced at 3 points (not 2) because the Edge that provides extra Wounds is Legendary. Technically, Legendary Edges should cost 6 points, but an extra Wound is objectively less valuable than +4 Toughness, so it's capped at 3 points.