You will need to cut the shirt in half in the front. Then align up the collar and sew it in first. After that the buttons should line up. this part...
Turn any regular T-shirt into a sporty button-up tee.
Step 1: Collect Two Shirts
Go to your closet and grab an old or warn out t-shirt and prepare to revamp in with an amazing button-up. Then grab an old button-up. If you do not have any, go to GoodWill and pick up some cheap clothes.