I have a heart vine plant that my mom gave me. The long dangling vines have grown and reached the floor several times. It moved to the top of our refrigerator allowing it to stretch but soon we(tm)ll need a higher ceiling and some furniture to match! Your heart vine shawl can be made as large as you want it, well at least if you have enough yarn.
Heart vine is a triangular shawl knitted from the neck down. The pattern starts with small diamonds leading up to vines of hearts.
400 meters of Lace weight
I'm totally addicted to knitting lace shawls and have now gone from altering existing designs to actually creating my own.