In the United States, a 3- to 4-year age difference between partners in their mid-to-late twenties is generally considered quite normal and common. Age differences like the one you mentioned are not usually seen as significant or problematic in most social circles or communities.
In relationships, what matters most is the emotional connection, shared values, and mutual respect between the individuals involved, rather than a specific age gap. As long as both partners are consenting adults and are comfortable with the age difference, it is generally considered acceptable.
However, it's important to remember that societal norms can vary, and people's attitudes towards age differences can differ based on cultural, regional, and individual factors. Some people might have opinions or preferences about age gaps, but ultimately, it is up to the individuals involved in the relationship to decide what works best for them.
The most critical factors in any relationship are open communication, trust, and understanding between the partners. As long as both parties are happy, supportive, and treat each other with respect, age should not be a significant barrier to a successful and fulfilling relationship.