I've always said that doing open segmented pieces is the easiest form of segmented turning. However this one is the most difficult segmented I've ever done and it only contains 12 pieces. I destroyed 3 of this design prior to getting one to stay together. It took that many tries before I got enough glue surface to hold it together. It measures 5-1/2" diameter x 2-3/4" tall and the opening is 1-1/2". Thanks for looking.