Sorry for the grainy photo here, I literally took this photo at 2am. I had bought these polka dot vinyl decals about a month ago (mine are the 4" ones) and knew it was going to take some time to put them up so I kept on putting them off until one night after I put Layla to bed, I was determined to just tackle it all in one night! The decals themselves are very easy to put on. It's the measuring of the wall, the distance between your dots and trying to get them spaced just right is the hard part. I absolutely love how it turned out though and my office is that much more fun with this wall!
1. Measure your wall and determine how many circles you can fit on the width (the entire width so like you'd be laying circle next to circle) split that in half so you now know how many circles you will be using and how many spaces in between. From there it is much easier to determine spacing between the circles. (You will have to adjust numbers depending if you want smaller spacing but this worked out for my larger spacing)
2. Once you have the approximate measurements, use painters tape to tape up your circles (you still have not removed it from the backing yet) and mark where you want all your circles. Stand back and make sure the lines are not crooked or spacing is off. After you are happy with that, now you know where exactly to put the circles. Start peeling off the backing and go for it!
I will say that I did have a few mistakes but the circles were very easy to peel off and put back on. They are not reusable but they are removable. So if you make a mistake it will be easy to peel off and put back on right away but if you leave it for a few days, you probably won't be able to reuse it after that.