Idols are a type of equipment that have many powerful and niche effects.
Idols can be equipped in a special area on the right side of the inventory. You gain more space for equipping Idols by completing quests, up to 20 slots.

Idols come in sizes ranging from 1 x 1 all the way to 2 x 2, 1 x 4, and 4 x 1. Larger sizes grant more of each stat, and many stats are restricted to specific sizes.
Most Idols can only be equipped by a specific base class, and class specific Idols have their own sets of possible affixes.
Idols always drop with 1 prefix and 1 suffix and cannot be altered through crafting.
The Idol Grid can be changed to different shapes by equipping an Idol Altar above the idol grid.