Each mini is roughly 2.5 inches tall with a little variance based on their pose. This mini is of "Fancy Groot" (Groot with some leaves and flowers as fancy formal wear). Note that this is the rarer flocked version.

This mini was opened so that it could be identified and examined. It appears to be in fair condition, unfortunately one of the flowers came loose in the box. You can put it back into place and it stays in place, but you may want to glue it since it's still loose (pictures #1 and #2). 

Unfortunately this damages the flaps on the box, although I did what I could to open them cleanly (picture #7). The bottom of the box was opened for anyone who wants to re-tape it for display.