Final answer:
A 12-by-16- or 12-by-18-foot stall is recommended for a large stall, ensuring horses have sufficient space for movement and comfort.
Step-by-step explanation:
A 12-by-16- or 12-by-18-foot stall is highly recommended for a large stall. The size of the stall is important to ensure that the horse housed within has sufficient space to move around, lie down, and stand up comfortably without feeling confined. Stalls that are too small can lead to health and behavior issues in horses.
Therefore, for a standard horse stall, which typically accommodates larger breed horses, these dimensions are considered appropriate.