Not sure if anybody's posted this yet, or if there's some easier solution I'm not aware of, but I went to the (relatively small) trouble of gathering this info, and thought I'd share it.
You can search for your desired type of cluster jewel in the in-game market by entering the corresponding # here as both the Min and the Max of the "Added Small Passive Skills grant: #" mod.
|| || |#|Type|Size| |1|Axe and Sword|Large| |2|Staff and Mace|Large| |3|Claw and Dagger|Large| |4|Bow Damage|Large| |5|Wand Damage|Large| |6|Two-handed Damage|Large| |7|Dual Wield Damage|Large| |8|Shield Damage|Large| |9|Attack Damage|Large| |10|Spell Damage|Large| |11|Elemental Damage|Large| |12|Physical Damage|Lar