Thank you for the great site, my father is going to love the items I bought. Thanks again for the timely response, quick responses to questions make the difference between a good site and a great site, and right now your site is great!
Size is as-packaged, or the diameter of loose marbles. ("D" is the diameter of round items other than marbles.)
Wurlitzer has a zig-zaggy twisted core of dark yellow, red, and dark blue, on a white core. The core is encased in crystal clear glass topped with black lines mirroring the zig-zag core which creates a great sense of depth.