Overview Reviews Product Description The brilliant and often misunderstood E=mc Squirrel. 4 1/4" x 5 1/2" Inside is blank and comes with envelope. Product Videos Custom Field Product Reviews Write a Review Write a Review × E=mc Squirrel Note Card Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *