When buying birthday gifts for girls born in the 1990s, of course, you should first consider your own financial situation. You don't have to pay too much attention to the price when choosing gifts. You can choose a gift that suits her best within your ability.
Girls all hope to have a big teddy bear (or other plush toys) at the head of their bed. Maybe she has never told others that she wants a plush toy, but this is an indispensable toy for girls at the head of their bed, especially the big teddy bear is very popular. You can also give her some personalized gifts, such as: personalized stamps, zodiac crystal tables, DIY T-shirts, color-changing cups, etc. For girls born in the 1990s, giving her a personalized newspaper designed and made by herself is undoubtedly a good gift, so that she can also try the feeling of being a star on the headlines.
If your girlfriend is a natural "foodie", then give her her favorite food, or give her chocolate. No girl can resist the temptation of chocolate.
The most important thing is the thought. As long as you have the thought and add a little romance, it will really be the favorite birthday gift for girls. A suitable birthday gift will bring you closer and make your girlfriend love you more.