First of all we’ll cut the canvas. We’ll keep 3 1/4″ here. The length of the collar is 8 1/4″. 1/2″ more for the margin. The height is 1.25″ round the corner. cut the cloth straight. now attach the canvas with the fabric like this. We’ll fold and give a raw stitch at the bottom side later we’ll remove this stitch. cut out the extra fabric. keep the canvas over the fabric and stitch the top side. give cuts at the side to fold it easily. take the point out using needle. cut out the extra cloth by leaving just 1/2″ for stitching. make the other side of the collar same like this. Now attach the collar in the dress. now remove the raw stitch. stitch the other side of the collar same like this. the end result will look like this. Now we’ll attach the zipper.