Looks like Google is testing and allowing users to set the size of the search result snippet. Google is showing some additional options in the SERP’s like as shown in the below pic.
S = No snippets
M = 161 character description in the snippet area
L = 638 character description in the snippet area
This is really something which will help users to pick the right webpage to visit. Techcrunch reported the below pic about the L search snippet …
Looks like a nice idea to me.
Forum discussion at WebmasterWorld.