What length wrist wrap should I buy: 12-inch, 18-inch, or 24-inch?

Across the reviewers we read, 18 inches is the default recommendation for most lifters because it balances support with ease of wrapping for bench, overhead press, and squats. 12-inch wraps come up mostly for CrossFit and Olympic-style lifting where wrist mobility matters, and 24-inch wraps are favored almost exclusively by heavy powerlifters benching or pressing maximal loads. r/powerlifting threads repeatedly note that beginners gravitate to 18-inch first.