The youngest child in the family will definitely get the most love, not only from his parents, but also from his older brothers and sisters. If your younger brother gets married, you should give more gift money, but it should not exceed what your parents give. You can discuss with your parents and see how much they give, and then reduce it a little. You can also ask colleagues who have experience in this area.
There is also a standard for giving gift money. The minimum cannot be less than 2,000. If the family situation is better, you can give 8,000 or 8,888. The meaning is also good, but you cannot give a gift money with the number "4". Parents are taboo about this number. 6666 is also good, which means that the younger brother's life will get better and better and will be smooth sailing. 13142, this is what a colleague said, the meaning is blood relationship, lifelong love for the younger brother, and care for the younger brother and sister. There are also local differences in giving gift money. It is also okay to increase it appropriately according to customs. The key is not how much you give, but to let your younger brother know your blessings. After all, family members don't care about so many etiquette.
In addition, as a sister, it would be too monotonous to just give a red envelope. You can also choose something more festive and meaningful as a wedding gift for your brother, such as
Wedding life-like dolls: Made of clay based on real-life photos, the similarity is quite high. You can use your brother's wedding photos to make one
Crystal piano music box: There is a crystal gift in the shape of a piano, which is equipped with a music box movement. The key is that you can photocopy your brother's wedding photos on the crystal, which makes it more unique
Descendant barrels: In the past, wooden washbasins, buckets and the like were essential items for southerners to get married. Of course, these things are rarely used in marriages now. But now there are related miniature descendant barrel crafts