These guys are a matched set. The tallest stands about 16".
An incredibly fun project that Mom and I did together. I saw something very similar in a catalog for way too much money, thought we could probably improvise one ourselves, so we did. She made one for herself, and this guy was mine.
Glass tree ornaments.
All of these projects are incredibly easy and if there's interest, I'll be happy to post a quickie tutorial on any or all of them.