Remember how Mr. Ollevander said "You will never get good results with another wizards wand" here is a game of logic to find out which wand is yours. There are six wands and three sizes three are Phoenix tail wands and the other three are Unicorn Hair wands. five of the wands will emit a greenish spark and one will glow blue with a rainbow of other colors.
There are two clues to help you:
1. Bigger is not always better.
2. Phoenix is a hot fiery bird.