Ummm, no?

Quote Originally Posted by Hardness
Each object has hardness—a number that represents how well it resists damage. Whenever an object takes damage, subtract its hardness from the damage. Only damage in excess of its hardness is deducted from the object’s hit points (see Table: Common Armor, Weapon, and Shield Hardness and Hit Points; Table: Substance Hardness and Hit Points; and Table: Object Hardness and Hit Points).
Quote Originally Posted by Hit Points
An object’s hit point total depends on what it is made of and how big it is (see Table: Common Armor, Weapon, and Shield Hardness and Hit Points; Table: Substance Hardness and Hit Points; and Table: Object Hardness and Hit Points). When an object’s hit points reach 0, it’s ruined.
Size and thickness only affect hit points, not hardness. Not RAI but plain jane RAW. The table right next to it makes it clear.