I don't think they even fit the definition of a "clipping"!
j/k They are small but should do fine. Depending on how much current you have in the tank, 1 of the 3 floating might grow quicker. Also you might want to space them out a bit more in case you do get another algae outbreak. I tend to find that algae at the beginning stages are normally contained to a particular area and will travel across the tank, so having the clippings spread out would allow you to salvage 1 or 2.
We gotta get you some more clippings!
How far away is TN from PA?