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The results also showed that fingernails now grow by 3.47mm every month â almost twice as fast as toenails. The nails of younger people and men grow faster. The little finger nail grows much more slowly than other fingernails, at a rate of 3.08mm each month. The middle finger has the fastest-growing nail.
Because toenails are thicker than fingernails. And that's another reason why some people think toenails take longer to grow. The thicker the nail, the longer it takes to grow. http://everything2.com/title/Why+fingernails+grow+faster+than+toenails.