Every futures product is defined by a spec sheet, not by convention. It states the unit of trade (1,000 barrels, 5,000 bushels, $50 x an index), the tick-size, the contract-multiplier, listed months, last-trading-day, daily price limits, trading hours and whether the contract is cash-settlement or physical-delivery.
Reading the specs is the first thing to do before trading anything new. Two products that look similar can differ by ten times in notional-value, and a contract you assumed was cash settled may drag you toward a delivery-notice.
Example: corn and wheat both trade on 5,000-bushel contracts with a 1/4-cent tick worth $12.50, but corn's daily limit is 25 cents ($1,250) and wheat's is 35 cents ($1,750). Same screen, different risk per limit move.
Related: tick-size, contract-multiplier, last-trading-day, physical-delivery, futures-contract