Step 8: Finishing

To begin the finishing touches, sew the top of welt to the top of  pocket inside .(First picture  is red to red, second picture gray to gray.

Then bring to other end of pocket to sew  to the bottom of welt.
After the top and bottom are sewn then  you'll  sew the sides of the pockets
Sew from  top to bottom of one side then the other and your pocket is done. (see pictures)
Then  the pocket-less shirt is no more....