T12 Formband 12mm Black or White Bias Cut Tape by Vilene Vleiseline

Vilene's Bias Tape is not like any other type of bias tape you may have come across. Think of it as a seam tape for curves!
You will often find patterns instruct you to 'stay stitch' areas of the pattern pieces. You do this because when the fabric is cut but not sewn it is prone to stretching, you may not even notice this stretch until you have finished your garment, but it can have devastating consequences, a neckline can be floppy or other parts fo the garment appear limp or out of shape, and there is nothing you can do at this point to rescue the garment.
Carefully stay stitching - sewing around the edges of the pattern pieces using a large stitch, close to the edge, will stabilise your fabrics and this is why it is recommended, but even the action of staystitching can result in stretching if you are guilty of pulling your fabrics through the sewing machine :-)
Vilene's Bias Tape is a heaven-sent little tape that does the job of stay-stitching for you. The tape is just 12mm wide and has a stay stitch running down one side. Iron the tape into place following the instructions below and your fabric will be stabilised and you will be ready to start dressmaking.
T12 Formband 12mm White bias cut tape x 100m

Length: Available in 1m, 3m, 5m or 100m roll

Machine Washable at 40 degrees.
Dry Cleanable
Iron Settings: 8 seconds

The 12 mm Bias Tape is stitched at 4/8 mm. When fusing, position the 8 mm side of the tape to fabric edge. Sew behind the row of top stitching. The top stitched tape prevents stretching of edges.
Press on firmly, dry heat.