This celestial compass will transform your room into a vibrant show of rainbows! These rainbow-making window decals “catch the sunlight” and transform them into a colorful rays all over your room! For the most vibrant rainbows, choose a window that receives direct sunlight. (Another great place to apply these are on car windows or a clear class frame that you can move around!) Read the backing card (or in the description below) for how to apply to your windows/glass surfaces. Instructions/Tips are on the backing card (although you can DEFINITELY just peel and stick it to the surface without any issues!) Decal is 3.3 × 5 inches in size.