This Family Tree Glass original design is inspired by that special bond between a mother and her precious children, each one sculpted in a different color symbolizing their individuality, & spiraling together into unity. Appx. 1.", comes on an adjustable cotton necklace cord, in a gift box made of recycled materials. Handblown using borosilicate (Pyrex) glass, sculpted in the flame, then kiln-annealed to ensure durability.