German Army Insignia Iron On. This is an iron on transfer. You need to have a hot iron, and iron this on using high heat for about 10 seconds. Will adhere to any fabric. Fully washable, solid white color. 2.5″ x 2.5″ This is a multi-purpose design, if you take scissors and cut around the white cross, you get a “medic” symbol! So German reenactors for their personal t-shirts or jackets, or just hospital or medic staff. Either way! Here are your directions: Heat the iron to high, NO steam. On a flat ironing board, rub the image in a circular motion for 3-5 seconds. Peel the paper backing while still hot.