In fact, traditional gifts have the advantages of traditional gifts, that is, they are popular and will not be embarrassed because the gifts are not good. If you want to give something special, I know some, such as crystal music boxes, seven-color teddy bear pillows, etc., which are girls' favorites and are very distinctive gifts. There are also various customized gifts, such as handmade necklaces, which can engrave your sister's name on them, which is very commemorative, and various patterns can be customized, with many styles and very distinctive.
If your sister is already a working person, you can give her some gifts related to her industry, such as a high-end small suit, which is dignified but not losing femininity, and a pair of beautiful high heels, which are neither too high nor too short, just comfortable. Or you can give her gifts according to her habits. If she has the habit of morning exercise, you can give her a comfortable set of sportswear or sports shoes, or a sports watch.
As long as it is a gift you give, she will like it. The friendship between sisters is more important than anything else. Don't forget to offer your blessings. If your boyfriend can also give a gift and blessings, it will add points to his own image.