What you will need:
old t-shirt or jersey knit scap and velcro
pattern pieces (link at the bottom)
Cut out your pattern pieces. The front piece is cut on the fold. I used the existing hem from a t-shirt so that I would not have to hem the doll shirt.
Cut out the back pieces. Cut 2 and make sure they face in opposite directions. I cut these pieces using the hem as well.
Open up the front piece and place the back pieces on top of the front piece with right sides together. Line up shoulder seams and stitch across.
Now hem the arms and neck openings. I just folded the fabric over 1/4 inch, since it is knit it will not fray.
With right sides together sew from the arm all the way to the bottom hem.
Now attach the velcro. Fold over one side so that you can attach velcro to the inside of the shirt.
Sew the velcro on top of the folded edge. I usually take a piece of velcro and cut it to the length that I need and then cut it in half lengthwise so that it is skinnier.
Sew the velcro on the other side along the outside edge. I do not fold this edge over.
Embellish the tee or leave it plain.
That's it. Easy, right?
If you make any doll tees, please remember to add photos to my flickr pool.