Magic and mundane size increases

[Gallant Armor]

I saw this FAQ and I wasn't sure how various effects might interact. By the FAQ, you can have one magical effective size increase and one mundane size increase, Bashing Shield and Enlarge Person are mentioned. But what about mundane size increase such as wielding a large weapon? Here is what I came up with:

Large Shield +1
Shield Spikes +1
Enlarge Person +1
Bashing Shield +2

For a minimum +3, maximum +5 depending on what stacks. I'm likely missing some options, so feel free to post any others you think would give a higher bonus and/or stack.

How much of this would stack?

[Saethori]

All "actual size" effects apply, to create the baseline. So if you're using a Large weapon, you start with that.

Then you add the single best of all magical size increases, such as Enlarge Person or Righteous Might.

Finally, you add the single best of all effective size increases, such as Lead Blades or the Impact enchantment.

Using your example, shield spikes won't apply but the rest will.

[SlimGauge]

Shield Spikes : "increase the damage dealt by a shield bash as if the shield were designed for a creature one size category larger than you"

Bashing: "deals damage as if it were a bashing weapon of two size categories larger"

Large Shield: See table "Table: Tiny and Large Weapon Damage"

Enlarge Person: "Melee weapons affected by this spell deal more damage (see Table: Medium/Large Weapon Damage). "

A large shield is actually large. Enlarge Person actually makes you larger. Shield spikes and Bashing are both VIRTUAL size increases, they don't actually change the size, so they don't stack with each other, but do stack with the first two.

Note that Shield Spikes can't increase the damage if it's already more than one size bigger than the wielder.

[Khudzlin]

Magic vs mundane is not the distinction to make (by the way, neither word appears in that FAQ). The distinction the FAQ makes is "size increase" vs "effective size increase". Effects of both category could be either magic or mundane (though I doubt there are any mundane effects that really increase size). Also, as Saethori pointed out, the actual size of an object or creature is not a size increase, it's just their normal size).

[Gallant Armor]

Thanks for everyone's responses, so it looks like +4 would be the current cap.

Follow up question:

Close Weapon Mastery:

At 5th level, a brawler's damage with close weapons increases. When wielding a close weapon, she uses the unarmed strike damage of a brawler 4 levels lower instead of the base damage for that weapon (for example, a 5th-level Medium brawler wielding a punching dagger deals 1d6 points of damage instead of the weapon's normal 1d4). If the weapon normally deals more damage than this, its damage is unchanged. This ability does not affect any other aspect of the weapon. The brawler can decide to use the weapon's base damage instead of her adjusted unarmed strike damage—this must be declared before the attack roll is made.

If a Brawler wielded a Large Bashing shield and had Enlarge Person cast on him, how would that change the damage from Close Weapon Mastery?

Based on what has been said it looks like the large shield would be the natural base that CLM replaces, leaving +3 size categories.

[Calth]

Gallant Armor wrote:

Thanks for everyone's responses, so it looks like +4 would be the current cap.

Follow up question:
** spoiler omitted **

If a Brawler wielded a Large Bashing shield and had Enlarge Person cast on him, how would that change the damage from Close Weapon Mastery?

Based on what has been said it looks like the large shield would be the natural base that CLM replaces, leaving +3 size categories.

You ignore the weapon for close weapon mastery, so weapon size and enchants don't matter. You would simply use the large character column of the unarmed damage table.

[SlimGauge]

Is your hypothetical Brawler medium sized ? Wielding a large shield in both hands ?

[Gallant Armor]

SlimGauge wrote:

Is your hypothetical Brawler medium sized ? Wielding a large shield in both hands ?

Yes, that sounds right.