Are tank bullets really big

Tank bullets, commonly referred to as tank rounds, can vary in size but are generally much larger than standard bullets used in small arms. A typical tank round can measure several inches in diameter and can be over a foot long, depending on the type and purpose of the round. For instance, a standard 120mm tank round used in modern main battle tanks is significant in size, designed for armor-piercing capabilities and explosive effects. Overall, tank ammunition is designed to deliver substantial firepower against armored targets.