First, you need to understand your face shape in order to choose the right sunglasses for you. In general, faces can be divided into the following types: round, square, long, heart, and oval. Different face shapes are suitable for different sunglasses frames, such as:

Round face: Suitable for square or rectangular sunglasses, can increase the Angle and contrast of the face.
Square face: Suitable for round or oval sunglasses, can balance the hard lines of the face.
Long face: Suitable for wide or decorative sunglasses, can reduce the length and proportion of the face.
Heart-shaped face: Sunglasses suitable for cat eyes or inverted triangles accentuate cheekbones and chin.
Oval face: Sunglasses that fit any shape, as long as they are the right size and proportion.
Second, you need to consider your skin tone, hair color, and eye color in order to choose the right sunglasses color for you. Generally speaking, skin tone can be divided into cool and warm tones. Different skin tones suit different sunglasses colors, such as:

Cool tone skin color: Suitable for black, gray, silver, blue and other cool colors of the sunglasses, can highlight the refreshing and bright skin color.
Warm skin tone: Suitable for brown, gold, red, orange and other warm colors of sunglasses, can highlight the warm and healthy skin tone.
Hair color and eye color can also affect the choice of sunglasses color, such as:

Black or brown hair: Suitable for dark or bright sunglasses colors, can increase the brightness and vitality of the head.
Blonde or red hair: Suitable for light or soft sunglasses colors, can add softness and elegance to the head.
Blue or green eyes: Suitable for sunglasses colors that are close to or opposite to the eye color, can increase the charm and attractiveness of the eyes.
Finally, you need to choose the right sunglasses style for you according to your dressing style and the occasion. In general, sunglasses styles can be divided into the following categories: retro, classic, sports, fashion and personality. Different sunglasses styles are suitable for different wearing styles and occasions, such as:

Retro style: Suitable for retro or elegant dress style, can add a kind of nostalgia and literary atmosphere. For example, vintage round frame, vintage cat eye, vintage pilot and so on.
Classic style: Suitable for simple or formal wearing style, can add a stable and professional atmosphere. For example, classic box, classic round box, classic captain, etc.
Sports style: Suitable for sports or casual dress style, can add a vitality and comfortable air. For example, sports half frame, sports full frame, sports sunglasses cap, etc.
Fashion style: Dress in a fashion or fashion style that can add an avant-garde and fashionable air. For example, fashion big frame, fashion lens, fashion mirror leg and so on.
Personality style: Suitable for personality or creative dressing style, can add a unique and interesting air. For example, personality heart, personality star, personality animal, etc.