There is no one "best" hairstyle for women over 70, as the most flattering hairstyle will depend on factors such as hair type, face shape, and personal style. However, there are many hairstyles that can be flattering and stylish for women over 70. Here are some popular options from the search results:

• Pixie Cut: A short, layered cut that can add volume and texture to thinning hair. This can be a good option for women who want a low-maintenance style.

• Bob: A classic cut that can be customized to suit different face shapes and hair types. A chin-length bob with layers can add volume and movement to hair, while a longer bob can be a good option for women with thicker hair.

• Layered Cut: A layered cut can add volume and texture to hair, making it a good option for women with thinning hair. Layers can be added to different lengths and styles, from a short pixie cut to a longer bob.

• Braids: Braids can be a good option for women who want to add texture and interest to their hair. They can be worn in a variety of ways, from a simple braid to a more complex style like a French braid.

When choosing a hairstyle, its important to consider factors like face shape, hair type, and personal style. A good hairstylist can help you choose a flattering cut and style that suits your needs and preferences.