I hesitate to call this a traditional Hawaiian calabash (umeke), because as I was turning, I goofed and clipped off the top cm of the bowl which would have completed the form. Oof! Regardless, I'm pleased with the piece, and love, love, love this curly pecan. 3/32" at the rim, and very gradually thickens to just over 1/2" at the base. Fully round bottom. This is a wedding gift for some friends getting married in a couple of weeks.