Size is an attribute of Monsters. There are three sizes present in the world of Ragnarok Online:

• Large (Big)
• Medium
• Small

Human playable character are by default, Medium sized when engaging each other in a PvP environment. However, if a character is adopted, they are considered Small sized. Doram playable character are considered Small sized.

Most weapons suffer size-penalties against certain sizes, although it is only minor when looking at damage on a grand scale.

Size Modifiers for Weapons

Weapon	Small	Medium	Large
Bare Handed	100%	100%	100%
Dagger	100%	75%	50%
1H Sword	75%	100%	75%
2H Sword	75%	75%	100%
Spear	75%	75%	100%
Spear (Peco Peco / Gryphon Mounted)	75%	100%	100%
Spear (Dragon Mounted)	100%	100%	100%
Axe	50%	75%	100%
Mace	75%	100%	100%
Rod	100%	100%	100%
Bow	100%	100%	75%
Katar	75%	100%	75%
Book	100%	100%	50%
Knuckle	100%	100%	75%
Instrument	75%	100%	75%
Whip	75%	100%	50%
Gun	100%	100%	100%
Huuma Shuriken	75%	75%	100%

Some equipment or card can nullify weapon size penalty.

• +11 Infinity Blade [1]

• Ally of the Demons [1] (If Gentle Touch-Convert is level 5)

• +11 Drakes Coat [1]

• +13 Bear Aimed Bag [1]
• +13 Melody Wing [1]

• Chaser's Shoes [1] (If Feint Bomb is level 10)
• Sniping Shoes [1] (If Aimed Bolt is level 10)

• Drake Card

• Biolab Gemini Crown [1] + Zodiac Boots(Thief) [1] + Eremes's Memory (If the sum of helmet, shoes, and weapon refinement level is 35 or higher)

• +10 Infinity Shadow Weapon
• +10 Infinity Shadow Shield

• Mistress Egg (When intimacy is Loyal)

• Shield Reduction Cards by Size
• Weapon Cards by Size

Monsters in Ragnarok Online
Race	Angel • Brute • Demi Human • Demon • Dragon • Fish • Formless • Insect • Plant • Undead • Human • Doram
Element	Holy • Shadow • Neutral • Water • Fire • Wind • Earth • Ghost • Poison • Undead
Misc.	Boss Protocol • MVP (Free for All) • Size • Kill Stealing • Monster Skills