Which nail shape is generally the strongest and least likely to break?

The square nail shape is generally considered the strongest and least likely to break due to its structural integrity. This shape features straight edges and a flat free edge, which provides a broader surface area for support. Unlike other shapes, the square design allows for even distribution of pressure across the nail, reducing the likelihood of chipping or breaking during daily activities.

Additionally, the thick corners of the square shape contribute to its durability. When the nails are trimmed to a square shape, they can withstand impact better than more tapered or rounded designs, which can create weak points. Therefore, the square shape is often recommended for those seeking a resilient nail structure.

Other shapes, such as round, oval, and almond, while aesthetically pleasing, may not offer the same level of strength as the square shape, particularly in high-stress situations or for individuals with more active lifestyles.