What is the recommended length of an iteration?

The recommended length of an iteration in software development varies depending on the project and team. However, the most common length for an iteration is two weeks, which allows for sufficient time to complete a meaningful amount of work while also providing enough opportunities to receive feedback and make adjustments. Some teams may opt for shorter iterations, such as one week, while others may prefer longer iterations, such as three or four weeks. Ultimately, the ideal length of an iteration should be determined by the team's capacity, the complexity of the project, and the amount of time it takes to deliver value to stakeholders.