Deep wave wigs are versatile and can suit a variety of face shapes. Here are some recommendations for different face shapes:

1. Round Face: Opt for wigs that can elongate the face, such as long straight styles with side or middle parts. These can help to create a more elongated appearance. Avoid overly voluminous or curly hairstyles that might make the face appear rounder.

2. Square Face: Wigs with large waves or soft curls can help to soften the angular lines of a square face, adding a feminine touch. Avoid wigs that are too close to the scalp or have very straight lines, as they can emphasize the width of the face.

3. Oval Face: Almost any hairstyle can suit an oval face, but to highlight this advantage, choose hairstyles that accentuate the facial contours, such as voluminous short hair or long hair with layers.

4. Diamond Face: Choose wigs that can balance the width of the face, such as those with bangs to cover part of the forehead, reducing the sharpness of the face. Styles with layers around the cheeks can also help to balance the face shape.

5. Long Face: Wigs that can shorten the face's length, like voluminous short styles or curly hair, can help to add width to the face and create a more balanced look.

6. Heart Face: A medium-length straight hairstyle with a flat bang to soften the forehead can create a better overall atmosphere.

In summary, deep wave wigs, with their natural wavy shape and layers, are suitable for many face shapes and can add different styles to different face shapes. Choosing the right deep wave wigs can effectively modify the face shape and add a sense of three-dimensionality and movement to the hairstyle.