I found this over at Oh So Delicioso & I am bookmarking it for my own personal use seeing as she has a LOT of the same things I do!!!
I saw this floating around on pinterest...and three clicks later I found the original post.
I love it, and wanted to know this info for myself, so I'm book marking it in my recipe
for more information, movie and explanations- even cupcake recipes.....go here
(Left to Right) Large round tip, Open star (Wilton 1M), Closed star (Wilton 2D), French tip