Spirals are cut from laminated blanks made up of center birdseye maple on both then the left one 2 morado and 2 tulipwood. on the right the tulip and morado position reversed. As a 5 and 3/8 long by 3 and 7/8" diameter blank to start turning the steps.
The steps are 2 and 3/16" diameter by a 1/4" high 22 of them on 16 separate offcenters in the circle. The steps are not glued They are turned from the blank so 2 single pieces