When giving gifts to your girlfriend’s sister, consider her age, interests, and preferences. Here are some suitable gift options:

1. If your girlfriend’s sister is younger, consider giving her a Barbie doll set or beautiful clothes.

2. For older girls, cosmetics or lipstick are good choices. These gifts are not only practical, but also express respect for her and hope that she can dress up beautifully every day.

3. If she likes to exercise, you can consider giving her a hot compress fascia gun to help her relieve muscle soreness after exercise.

4. Swarovski's "beating heart" jewelry symbolizes the depth, purity and romance of the deep sea, and represents the pursuit of a better life.

5. A fashionable and luxurious women’s bag is also a good choice, such as VH women’s bag. Choose soft and textured leather with exquisite buckles, suitable for various occasions.

6. AI silk heating eye mask, for someone who often uses electronic products, it can relieve eye fatigue and enjoy eye SPA.