LOVE these. The color - off white with brown script - works with so many themes and pages. The font is 'universal' , too. My letters, unlike the poster above, are completely sticky. I like dimension though, too - so even if these didn't stick, I'd get them and use glue dots.
Although these chipboard letters are adorable (which is why I bought them), they don't stick! I had to use glue dots to keep them in place. I also bought the Passport kit, which came with regular alphabet stickers and they work great and look the same. If dimension is not important for your page, I would say go with the stickers instead.