Vellum stickers!! Who would have considered that you could create your own?? I certainly had not until I wrestled with getting the look I wanted on those vintage cards!! I laser printed my greetings on vellum, cut them apart and applied double sided tape on the back of them!! That easy!! Though I must point out that you have to have a continuous layer of adhesive on the back of your vellum to get a nice smooth look when you apply your sticker to your surface. As you can see from the photo I used a metal ruler to hold my little piece of vellum in place which also gave me a line to work from when I was applying my double sided tape. I used double sided tape with a paper backer which makes it easier to trim and apply. I trimmed the vellum to the edge of the tape so I would get the seamless look I was going for. I expect you could carefully apply several lines of tape on a larger piece of vellum and get the same effect. Wider double sided tape would also be beneficial!!
So I anticipate using this technique again!! There are times you just want sticky vellum and nothing else will do!! Give it a try!!