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According to Items and Sizes Small and Medium creatures seem to be able to use Small and Medium weapons interchangeably without any penalty, and they can use Large weapons but they gain the Clumsy 1 condition.

The Bulk rules in this chapter are for Small and Medium creatures, as the items are made for creatures of those sizes.

In most cases, Small or Medium creatures can wield a Large weapon, though it’s unwieldy, giving them the clumsy 1 condition, and the larger size is canceled by the difficulty of swinging the weapon, so it grants no special benefit.

Items of Different Sizes also specifies:

Creatures of sizes other than Small or Medium need items appropriate to their size.

I've got several questions related to inappropriately sized weapons:

  • What happens if a Large creature tries to use a Medium weapon?
  • What happens if a Small/Medium creature tries to use a Tiny weapon?
  • What happens if a Small/Medium creature tries to use a Huge or bigger weapon?

And all other possible permutations of these questions.

Then, there is no mention about damage at all, is it the same for all sizes? It seems absurd that a Tiny hammer does the same damage as a Gargantuan hammer.

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In the interests of balance and simplicity, some flexibility is lost

Pathfinder 2e removes the capability for Small/Medium ("Standard") creatures (read: PC-like) to wield particularly odd-sized equipment. There are no rules whatsoever about Tiny/Large/Huge/Gargantuan creatures because the GM's should be making their best judgement regarding them. For me, that would mean treating the weapon as either unable to be used, or it's Light/Heavy version if available.

Currently, the only way for PC's to 'break the mold' on Small-Medium sizing is to be a Tiny Sprite. Information on Sprite weaponry fits with the rest of the description, from Tiny PC's

You can purchase weapons, armor, and other items for your size with the same statistics as normal gear, except that melee weapons have a reach of 0 for you (or a reach 5 feet shorter than normal if they have the reach trait).

GM's are expected equip their monsters and such with appropriately sized weapons; otherwise, they can also gloss over their ability to use them with special abilities and/or penalties accounted for in creature creation.


Bonus damage from size is included in attacks' flat bonus, such as that granted by Enlarge or lack thereof, such as in Shrink. Even Gargantuan creatures use standard weapon dice (here, their striking longspear does 2d8 damage and their greater striking greatsword does 3d12)*. Creatures from the Bestiaries should have modifiers to have them deal an appropriate amount of damage included, and the Building Creatures section has allowances for a range of damage quantities; High or Extreme can be used for particularly large creatures; it also includes that GMs can play around with the die/modifier combo that averages to the given number.

On Table 2–10, you'll find a damage expression (a die roll or rolls plus a flat modifier) you can use as is, or you can take the damage in parentheses and build your own damage expression to hit that number. If you do the latter, remember that a d4 counts as 2.5 damage, a d6 as 3.5, a d8 as 4.5, a d10 as 5.5, and a d12 as 6.5. Usually a damage expression works best when roughly half the damage is from dice and half is from the flat modifier. If your creature deals special damage, like 1d6 fire from flaming attacks, that counts toward its total damage per Strike. Keep in mind that a creature using a weapon should have a damage value that feels right for that weapon. Extreme damage works well for two-handed weapons that uses d10s or d12s for damage. On the other hand, a dagger uses only d4s, so a dagger wielder would need something like sneak attack to deal extreme damage, or you might compensate for the dagger's lower damage per Strike by giving the creature the ability to attack more efficiently or use other tricks.

*Either the Titans have misprints in their weapons or they gain one additional die on weapon attacks.

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  • \$\begingroup\$ I believe this can become a player issue too, since last month there is a tiny ancestry (sprites). \$\endgroup\$ – Yopi Lapi Mar 8 at 18:49
  • \$\begingroup\$ The rules for Sprites (which it is stated are Rare because of their size) are in their own section as well, "You can purchase weapons, armor, and other items for your size with the same statistics as normal gear, except that melee weapons have a reach of 0 for you (or a reach 5 feet shorter than normal if they have the reach trait)." \$\endgroup\$ – Ifusaso Mar 9 at 2:08
  • \$\begingroup\$ Giant Instinct barbarians also have rules for larger-than-normal weapons. \$\endgroup\$ – Ben Barden Mar 9 at 22:03
  • \$\begingroup\$ Yeah I'm not trying to make a comprehensive list of when different size weapons might be used, but that's another example of 'the dice don't change but you get a bigger +damage'; in all cases, there is no innate benefit \$\endgroup\$ – Ifusaso Mar 10 at 0:16

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