On the other hand, wearing a suit and tie in front of an audience in jeans and T-shirts is rarely a good idea. Regardless of what you're wearing, make sure it works. Make a thorough assessment of how you look in front of a full-length mirror. And don't hesitate to get a second opinion. Check not just for fashion sense but also for fit.
Nothing sends a worse message than a poorly tailored jacket.
One common offense is sleeves that hide your hands. Hands speak worlds about capability. They also reinforce your words. Hiding them can send a subtle message of incompetence. The jacket sleeve end at the middle of your wrist bone, with the shirt sleeve extending three eighths of an inch beyond.