American Flag Retroflective 3XL Extra Large 3M Decal 7 3/4"x 14" Scotchlite Reflective Material by 3M. Contains over 45,000 micro reflectors in each square inch (6 cm2) of 3M material. Retroflection is the brilliant flashback when light strikes the tiny reflectors. Attach to any firm, non-porous surface such as SUVs, autos, boats, and windows. Size: 3XL Extra Large measures 7 3/4"x 14".