Inventory

 is the name of the item storage system that is unique to each individual player character in Ragnarok Online and Ragnarok Online II. Items picked up out in the field are immediately stored in a character's to be later transferred to either the more expansive Storage or to a guild's warehouse.

Ragnarok Online
In RO, player has an unlimited amount of item slots so players can store as many items as they want in their, provided the total weight of all items does not exceed the character's Weight Limit.

Items can be dropped from the by dragging the item outside of the Inventory window. If players drag on a stack of items from their, a pop-up will appear asking how many of those items does the player want to drop.

After the Renewal update, player inventories received an extra Favorites tab for players to separate particular items from the rest of their. Player inventories also received a check-box for players to check in order to prevent items from being dropped accidentally.

Weight Penalties
Exclusive to RO, every item has a weight value for balancing purposes so players do not carry too many useful items. Players can expand their characters' Weight Limit by investing points in their characters' Strength stat.

The game highly discourages players from carrying too much by having weight penalties. If a character's weight exceeds 50% of its Weight Limit, it will be unable to regenerate HP and SP naturally, even when sitting down. If the character's weight exceeds 90% of its Weight Limit, it will no longer be able to attack and use skills on top of not being able to naturally regenerate HP and SP.

In addition to the weight values, a character can also be considered "overweight" by the game if it carries more than 100 unique items.

Ragnarok Online II
In RO2, player has no Weight Limit, but are instead limited by the amount of item slots available in their bags. Every character comes with a 20-slot default bag and can gain more item slots by equipping up to 3 extra bags in their bag slots.

To increase space, players have the option to acquire bigger bags to put into their bag slots. Bags can be replaced by overlaying the new bag over an old bag; all items in the old bag will be automatically transferred to the new bag.

A certain amount of bags are available in-game while bigger bags can only be acquired from the Kafra Shop:
 * Super Small Bag - 5 slots
 * Small Bag - 10 slots
 * Medium Bag - 15 slots
 * Large Bag - 20 slots
 * Very Large Bag - 25 slots
 * Super Large Bag - 30 slots
 * Extra Large Bag - 25 slots
 * Extra Large Bag Slot - Adds 5 slots to Extra Large Bags only

Patches
Ragnarok Online Ragnarok Online II
 * Patch (2018 Dec. 19)
 * Inventory Extension Coupon items will be added to Cash Shop.
 * Patch (2018 Jan. 03)
 * The weight limit for using skills is now changed.
 * Weight limit for skill use: 50% -> 70%
 * Patch (2017 Nov. 08)
 * Character weight penalty is now changed.
 * Existing: If weight is over 50%, HP/SP cannot be restored.
 * Change: When weight is 70% or more, HP/SP cannot be restored.
 * Patch (2016 Dec. 21)
 * The Sort button is added to the Inventory's personal tab.
 * Patch (2016 Oct. 26)
 * Personal tab lock is added to the Inventory.
 * Patch (2016 Jul. 06)
 * Fixed a bug when carrying items in the Inventory for more than 100 days, this could prevent normal transactions.
 * Patch (2016 Feb. 24)
 * Changed some Inventory UI details.
 * Patch (2015 Oct. 07)
 * Implemented item link system: players can now compare equipped gear to gear in their Inventory.
 * Patch (2015 Mar. 11)
 * Chat, Inventory and Kafra Storage can now be scrolled using the Page Down and Page Up keys.
 * Patch (2014 Nov. 26)
 * Fixed an issue with weight not getting updated when receiving mail.
 * Patch (2012 Jul. 04)
 * Opening Inventory window after obtaining an item will now show the newly obtained item with pink silhouette.
 * Patch (2012 Mar. 28)
 * Added item move function where pressing 'Alt + Right-Click' on the desired item will move the item between Inventory, storage, cart, trade, or vend creation windows.
 * Patch (2011 Dec. 07)
 * Added a Favorites tab and the ability to disable item dropping on player Inventory.
 * iRO2 Patch (2017 Dec. 11)
 * Fixed inventory unlocking in solo dungeons.
 * iRO2 Patch (2017 Aug. 28)
 * Inventory no longer unlocks in solo dungeons.