Ninj43
Not that I would worry too much if it isn't (clean, pressed and correctly worn being more important), but might be a good starting point if anyone needs to buy a fresh one.
Any smart suit would do. As you say the important thing is that is must be
clean, pressed and correctly worn. That last can also cause problems.
White shirt hanging over trousers is 'correctly' worn by some people. However when I asked a 12 year-old nephew he confessed that it was only 'cool' and worn out when not in school.
On the interview techniques course we watched a film of one interview. The lad had on a very loud shirt, pointed collar, kipper tie etc. All he was picked up on was the button down collar was not buttoned down. It was cited as lack of attention to detail.
So, dress smartly and dress to the occasion.