If I have learned anything by writing this post, it is that there is no average size for any scarf. There are many variations in sizes of scarves -depends on what you want it to look like and the material. The ones you get in shops range from skinny ones in the dimension 36 inches by 3.5 inches to as big as 94 inches by 45 inches. A typical scarf measures 70 inches by 22 inches.