code/__DEFINES/inventory.dm

WEIGHT_CLASS_TINY	Usually items smaller then a human hand, ex: Playing Cards, Lighter, Scalpel, Coins/Money
WEIGHT_CLASS_SMALL	Pockets can hold small and tiny items, ex: Flashlight, Grenades, GPS Device
WEIGHT_CLASS_NORMAL	Standard backpacks can carry tiny, small & normal items, ex: Fire extinguisher, Stunbaton, Gas Mask, Metal Sheets
WEIGHT_CLASS_BULKY	Items that can be weilded or equipped but not stored in an inventory, ex: Defibrillator, Backpack, Space Suits
WEIGHT_CLASS_HUGE	Usually represents objects that require two hands to operate, ex: Shotgun, Two Handed Melee Weapons
WEIGHT_CLASS_GIGANTIC	Essentially means it cannot be picked up or placed in an inventory, ex: Mech Parts, Safe

Define Details

Items that can be weilded or equipped but not stored in an inventory, ex: Defibrillator, Backpack, Space Suits

Essentially means it cannot be picked up or placed in an inventory, ex: Mech Parts, Safe

Usually represents objects that require two hands to operate, ex: Shotgun, Two Handed Melee Weapons

Standard backpacks can carry tiny, small & normal items, ex: Fire extinguisher, Stunbaton, Gas Mask, Metal Sheets

Pockets can hold small and tiny items, ex: Flashlight, Grenades, GPS Device

Usually items smaller then a human hand, ex: Playing Cards, Lighter, Scalpel, Coins/Money