This is a real bird egg, a Rhea is smaller than an Ostrich and so are their eggs White in color with a fairly smooth surface. Acrylics and Oils both are wonderful mediums to use on these eggs. They vary in size from 5 inches to 7 inches in length and about 4 to 5 inches in diameter. there is a hole in one end of each egg and an ornament hanger is very easy to insert for a hanging egg.