They were made by Catnip Studio Too , which you can find on the link if you click on the name, decoupaged with beautiful floral Japanese yuzen chiyogami papers.
You can , of course, do some decoupage yourself with this particular Japanese paper, and you can also find sellers for Japanese yuzen chiyogami paper on Etsy.
I found two, Mosaicmouse and Crafty Paper Oz but there must be tons more.
Here's a small selection of this kind of fabulous paper..
And of course, if you don't want to buy the paper and you are pretty handy with a paintbrush and paint, you can use the patterns as an example to inspire you , and paint the eggs by hand!!
Here are some more of the fabulous examples of the decoupages eggs .
Now, remember, you don't HAVE to craft your eggs , you can buy them from Catnip Studio Too if you have no time to make your own.
I am seriously considering in buying a few of these !
Have a great week, people. whatever you are doing!