I assume you want gifts that are more particularly suited to them than to strangers of the same age. What are their particular interests or hobbies? How do they spend their spare time? What jobs do they have? What colors do they wear to work, for casual wear? What do they like to read, google? What are their future plans? I have 2 granddaughters age 22 and 23. They wouldn't like the same things as they are completely different people, but they are sisters.