Cut two shirt fronts, one shirt back, and two ties from the Purl Rabbit Clothes PDF.

Fold the ties into quarters lengthwise so that the raw edges are hidden.  You can do this by hand, ironing the fabric as you go, or you can feed the fabric through the bias tape maker to fold it, then iron it.  Stitch across the length of the tie to secure the folds.

Sew 1/4-inch seams along the bottom edge, neck edge, cuffs, and front edge seams.

Lay the shirt back pattern piece right side up on your work surface. Place one tie at both side seams, just below the sleeve.  Lay the shirt front pattern pieces on top, right sides down. Pin in place. Sew the sleeve and side seam, securing the tie and joining the back to the fronts. Clip a small V in the armhole of each sleeve (don't cut the seam!) to ease the fabric.

Turn the shirt right side out and press it. Pret-a-porter!