Tailor it to fit February: How to make a tee shirt and sleeves longer

I really took apart my little brother's shirt! I added a good 1.5 to 2 inches to the the shirt's length and the sleeves. I want to do this with beck's shirts, he stays skinny and gets taller and taller. 

If you want to know how to make a tee shirt wider (a size or two bigger), tutorial here.

Supplies:

Old tee shirt or fabric (you can make it match or not)

Tee shirt that is too tight

Perfectly fitted shirt

Ruler

Scissors

Pins

Sewing Machine

Thread

 Instructions:

 

 2. measure the sleeve or bottom of shirt and cut out a piece of fabric or part of an old shirt to the length of the sleeve's opening or the opening of the bottom. Make the widths at least 2.5 inches. Half inch for the seam allowance and 2 inches for the new hem.

2. Unstitch the sleeves's or the bottom of the shirt's hem.

3. Iron flat

4. Pin the new piece right sides together to the ironed end of the sleeve or bottom of shirt.

5. Flip inside out and iron open.

6. Fold the added (now minus the sewn seam allowance) 2 inch piece in half so the hem is now an inch wide. Iron.

7. Flip right side out and topstitch the top of the newly added sleeve or shirt bottom end. I tried to mimic the original hem line by sewing the first stitch at least one inch in (directly right under the new seam), and the second a quarter of an inch outwards from that.

8. Wash to get rid of the old hem line.