This small but mighty hosta is a variegated sport of the award winning Hosta 'Blue Mouse Ears'. 
In spring, the rounded leaves of heavy substance are blue-green with a bright creamy yellow margin.  By summer, the leaves transition to grey-green with a creamy white margin.  Incredible substance. Lavender flowers on perfectly proportioned scapes appear in early summer.
This small hosta makes a perfect addition to troughs or other patio containers with good winter drainage.