This is a super simple DIY that will allow you to transform any plain old t-shirt into a cute peter pan collar top.
1. Mark the center of the front collar with a pin. Lay your shirt down flat and trace the neckline and should seam. Then, make a rough sketch of how you want your collar to look. Smooth out lines and cut out. 2. Fold both your fabric and interfacing in half. Pin the collar pattern piece on top of the fabric, and cut out to make two mirror image pieces. Do the same for the interfacing. Iron the interfacing to the wrong side of the collar pieces. 3. Pin the collar pieces to your top, lining up center front. Sew along the edges of the collar appliques using a zig-zag stich. You may have to stop and adjust every now and then to prevent unwanted tucks or puckering. I like to sew around the edge twice to secure. Press with an iron. 4. Hand sew on your shank button at center front.