1969-1970 Topps Basketball Rulers
This unusual set was inserted one at a time into packs of the regular 1969-70 Topps basketball cards. The thin paper items measured 2-1/2"x9-7/8".
The drawing on each ruler shows how tall the respective player is, allowing collectors to compare player heights.
Although not widely collected, a set in ex-nm condition could today command about $500, with the Lew Alcindor alone going for about $125.
(Note: although the Rulers number 1-24, there is no #5.)