This is an iron-on adhesive sheet that allows you to create original iron-on patches and appliques using your favorite fabrics, felt, etc. Size: 21cm x 30cm (approx. A4 size) Instructions: 1. Place the iron-on adhesive sheet on the back of your favorite fabric. (Be careful not to put the sheet on the wrong side.) 2. Place a pressing cloth or parchment paper over the iron-on adhesive sheet and press with a medium-heat iron for about 15-20 seconds. 3. Once the fabric has cooled, peel off the backing paper. 4. Cut out the shape you like, and you're done!