1, small red envelope: usually refers to some symbolic amount, such as 10 yuan. This kind of red envelope is suitable for the situation that the relationship with big brother is relatively general or relatively new, as an expression of courtesy and blessing.

2. Medium-sized red envelopes: The amount of medium-sized red envelopes is usually between 50 yuan and 200 yuan. This amount range is suitable for situations where you have a good and familiar relationship with your eldest brother. The amount of this red envelope can show your respect and gratitude.

3. Big red envelopes: The amount of big red envelopes usually exceeds that of 200 yuan. The specific amount depends on one's financial ability and relationship with big brother. This kind of red envelope is suitable for occasions with very close relationship with big brother or special occasions such as festivals, weddings, birthdays and other major celebrations.