The Hem-It tape/web is 20 mm wide and approximately 4 meters long. It is washable, dry-cleanable and easy to use.
 
Always first test on a sample of your material.
 
Fold your material to the required width of the hem you wish to create. 
Then lay the hemming tape/web in the folded portion of the material.
Cover with a damp cloth.
Iron on for 6-8 seconds.