The small-scale polka dots look grownup and chic, since large-scale polka dots can appear more kid-appropriate.
For this project you'll need metallic contact paper, a large circle cutter, measuring tape and pencils.
Get Started: Cut, Measure and Apply
Decide on the size for your polka dots. Then use a large circle cutter to cut out polka dots from the contact paper.
Map Out the Polka Dots
Figure out the spacing and pattern you want for your polka dots. Measure the distance you want to create from one polka dot to the next. Use a piece of string and blue tape to map out the polka dots on the ceiling. Create tape "flags" on the string and use a pencil to mark where each polka dot will go. Simply hold up the string and make a pencil mark at each tape flag to mark the center of each polka dot. Follow the same process for the width of the ceiling.
Apply Polka Dots
Place your polka-dot decals on the pencil marks and create a grid of metallic dots on your ceiling. Peel off the back of the contact paper as you stick each polka dot onto the ceiling. Smooth with your hand.