My order arrived yesterday and what fun opening the boxes. The marbles, for my grand-daughter will thrill her on her birthday. All of our grandchildren want marbles so I'll be ordering more throughout the year. Thanks for the excellent service!
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.