If you're planning to dispense with the jacket entirely, that's absolutely fine. Sometimes, offices can be pretty hot places to spend time, and you can achieve a professional look without a blazer or jacket. However, there are some things to remember when matching shirts and jeans for work. For one thing, pick high-quality dress shirts with restrained patterns and colours and pick a relatively close fit. This striped VPASS shirt is a good example of the right kind of thing. It's smart, attractive, but not too distracting.