I absolutely love these balloons. They are colored really well and have a pretty pearlescent appearance once inflated. They are easy to inflate and pretty easy to tie roo. They are listed as being 12 inches and although I wasn't able to actually measure them, they are very large.
The one part I found most impressive was how long they last. I inflated some for my daughter's birthday over a month ago, and they are still just as big and beautiful as they were the day of her birtbday. I am very impressed!