Put the suit on. No need for a tie.
1. First, take three jacket pictures: front, side and back. Button the jacket as if you went out (top on two-button suit or top two on a three-button suit, etc.). Jacket pictures should be like this:
Explain where you feel you need alterations, for example: "pants are too tight around thighs" or "collar sticks out too much." You can pinch the fabric until the garment fits well and measure the pinch. This is how much we will take in. Alternatively, you can measure how much we will need to loosen. Jog down all these measurement in the alterations form.