Yellow: Lemon Slice Earrings
Green: Hungry Green Caterpillar
Turquoise: Peacock Feather Round Glass Pendant
(A beautiful photographic print from Ninainvrom)
(An Epson Printed Greeting Card by yours truly, BeckyKazana) If you are just beginning, I would suggest having some prints made at your local print shop. They will be very knowledgeable about paper types and printing techniques and you can see the difference in quality and make the value judgment about what you want to offer on Etsy.
(Frida print on polycanvas by AFancifulTwist) Another fun way to answer these questions is to go shopping! Poke around on Etsy and look carefully at the work of an artist you admire. Pay special attention to how they describe their prints. Look at artists that are selling lots and lots of prints- that's the goal after all! Also, look at sellers who are making the same kind of work as you are and how they are printing it.
(Gocco printed greeting card from TwoGuitars)