A snap fastener closes a garment invisibly. A small, clear plastic snap is hardly visible even when it is not closed. A metal snap is an even more secure fastener that is available in many sizes from tiny 1/8-inch snaps for baby garments to snaps 1 inch and wider for heavy fabrics. Use the right technique to securely sew on a snap and avoid the common mistake of sewing a snap the way you do a button.
Pull apart the two halves of the snap if they are not already separated.
Place the stem side of the snap on the side of the garment that will be against the wearer's skin. Place it one snap-width from the edge of the garment and the same distance from the end of the opening. For example, place a 1/2-inch snap 1/2 inch below the neckline and 1/2 inch in from the edge of the left side of a woman's blouse. Place it on the outside of the garment.
Thread a needle with 30 inches of thread and knot the ends together.
Bring the needle up through the fabric beneath one of the holes in the edge of the snap and up through the hole in the snap. Make this stitch close to one end of the oval hole.
Bring the thread over the edge of the snap and into the fabric. Stitch as close as possible to the place where you brought up the thread. The stitch should go straight out like the spoke of a wheel.
Make three more stitches in the same hole, moving a little distance along the edge of the snap with each stitch. If your snap is less than 1/4 inch you will only need three stitches per hole. If it is larger than 1/2 inch you will need more stitches. For example, use six stitches per hole on a 1-inch snap.
Sew through all the holes on the snap in the same way. Work your way around the edge of the snap.
Place the side of the snap with the indentation on the other side of the opening in the garment, facing in, so that it lines up perfectly with the stem half of the snap. The smooth side of the snap is more comfortable if it rubs against the wearer's skin. Sew this side of the snap on in the same way.
Sew square snaps on in the same way.
If a snap is sewn on like a button with the threads going from hole to hole it will not close securely and the metal will cut into the thread causing the snap to fall off prematurely.