Size is as-packaged, or the diameter of loose marbles. ("D" is the diameter of round items other than marbles.)
: 6.25 x 9.75"
This plastic marble sizer is lightweight, tough and flexible. 42 circles from 1/16" to 2 1/4" allow you to accurately measure the diameter of any marble from the smallest micro pee-wee to the larger art glass marbles.
Please Note: The templates sold in many stores are not optimal for measuring marbles - read the small print; "pencil allowance on all openings." This means the openings are a bit bigger than labeled. Our templates are custom-made to be precision sized, there is no allowance. This makes for a more accurate template.