One of the ways in which Peck brings the character of Grandma to life is the way in which she dresses. The year is 1937 and instead of wearing typical clothes for a grandmother of that era, Grandma Dowdle opts to wear men's clothing and chew on a toothpick. This adds to her personality and her reputation of being no nonsense.
She is depicted as being tough as nails, but she also has a heart of gold as indicated by her determination to assist one of her neighbors when it seems that no one can.