Which nail shape is most effective in preventing chipping or breaking?

The most effective nail shape in preventing chipping or breaking is the round shape. Round nails have a smooth, curved edge that helps distribute stress more evenly across the nail. This design reduces the likelihood of snagging or catching on objects, which can lead to chips or breaks. The rounded edge also allows for a more natural flexibility, which is beneficial in daily activities that involve the hands.

While other shapes such as square or square oval have their advantages in aesthetics and are often preferred for their boldness or modern look, they can have sharper corners that are more prone to damage when subjected to stress or impact. The oval shape, while also offering a good compromise for strength and style, still does not provide the same level of protection against breakage as the round shape. Thus, choosing round nails is a practical decision for those looking to maintain the integrity of their nail design.