Up here selling firewood is serious business and you can be fined for short loads.
WEIGHTS AND MEASURES
Chapter 501: WEIGHTS AND MEASURES LAW
Subchapter 1: GENERAL PROVISIONS
§2302. Definitions
1. Cord;
A. A standard cord is a unit of measure of wood products 4 feet wide, 4 feet high and 8 feet long, or its equivalent, containing 128 cubic feet when the wood is ranked and well stowed. Any voids that will accommodate a stick, log or bolt of average dimensions to those in that pile shall be deducted from the measured volume.
A-1. A cord when used in connection with sawdust, chips or shavings means the volume of material contained in 128 cubic feet at the time of sale.
A-2. Fuel wood, when sold loose and not ranked and well stowed, shall be sold by the cubic foot or loose cord, unless other arrangements are made between the buyer and seller. When sold by the loose cord, the wood in any cord shall average either 12 inches, 16 inches or 24 inches in length. When so sold, the volume of the cords shall be: A cord of 12 or 16 inches in length shall mean the amount of wood, bark and air contained in a space of 180 cubic feet; and a cord of wood 24 inches in length shall mean the amount of wood, bark and air contained in a space of 195 cubic feet.
B. A face cord is a unit of measure 4 feet high and 8 feet long, or its equivalent, containing 32 square feet. The length of sticks shall be agreed upon by both parties;
Part 6: WEIGHTS AND MEASURES
Chapter 501: WEIGHTS AND MEASURES LAW
Subchapter 2-A: MEASUREMENT OF WOOD
§2366-A. Disputed wood
In case a dispute arises as to whether wood was accurately scaled or measured, the person aggrieved may file a complaint with the state sealer. Any complaint shall be initiated within 15 days of discovery of the alleged grievance. The state sealer shall investigate the complaint. As part of the investigation, the state sealer or deputy state sealer may subpoena such witnesses and documents as may be necessary to determine the matter, and may cause the disputed wood to be impounded and check measured if it may be separately identified. In the event that an aggrieved party fails to file a complaint within 15 days from discovery of the alleged grievance, the aggrieved party is barred from seeking a remedy under section 2368, subsection 2.
Your state could have similar statutes governing the sale of firewood. Might be worth looking into.
DFB