Two-in-one BABY TOP SEWING PATTERN: 

SEWCRAFTYME.COM

with a back- open design

and a cute  back tie

Gather the supplies

Fold the fabric  and place the template on the fold. Cut to get the outer front piece. Repeat on the lining fabric

Cut the back pieces and lining using the back pattern template

Your top front, top back, and lining pieces will look like the picture above

Cut the ruffle and tie pieces

Place  the two back pieces over the front piece and sew the shoulders shut

Grab the full  tutorial via  the link below