So for this tutorial you will need an old t-shirt, lace, pins, sewing machine and time of course :)
Good Luck! :D
Watch also the tutorial here:
Step 1: First Step
#2: You only will need one side of the t-shirt fabric cause the other is replaced with the Lace
Step 2: Second Step
#2: Safe with pins the two fabrics together
#3: Then cut the lace like the shape of your t-shirt, leaving about 3-5 cm more.