Standard mules are hybrid animals created by breeding a male donkey (jack) with a female horse (mare). They inherit traits from both parents, resulting in a strong, sturdy animal known for its endurance and sure-footedness. Standard mules typically stand between 14 to 16 hands high and can vary in color and appearance. These animals are often used for work, particularly in agriculture and transportation, due to their ability to carry heavy loads and navigate rough terrain. Standard mules are also known for their intelligence and calm demeanor, making them suitable for various tasks and companionship.