Mobiles look great when paired side by side, in two shades of pink, one painted with gouache, the other in a soft off-white.
Hanging recommendation: Stagger the pieces in height to create contrast (with the fishing line that comes in the package), and separate them just far enough so that they can each rotate without catching each other or touching the wall.
Estimated shipping: $30
Each piece:
30" total height (up to hook)
22" sculptural height
20" avg. diameter