Purchased as a coin-sized $5 single-polyp frag in May 2007, this is a photo of my frogspawn in Aug 2007:

Almost six years later (Feb 2013), it's grown from a single headed polyp to a colony with 50-60 or more branches and primary heads:

This frogspawn colony is about 9" in height and spans about 11" from side to side and front to back (12" black ruler at bottom for size perspective):