Well, it depends. There are many factors that come into play when choosing a peep sight. A small peep sight is perfect for those who need a very tight, accurate shot- such as when shooting small game. However, its best used during daylight only and for those without vision problems.A larger peep sight is good for those with vision problems, aging eyes, those who shoot from different levels/angles, and who shoot during the early mornings or late evenings when light isn't that bright.