In common with all but one of LA Bantam's books Jokes and Wisecracks is 100 pages long and is 110 mm (4 5/16") wide by 152 mm (6") tall. Cover and pages are made from high acid pulp paper. The page collation is:
[1] title page,
2-100 Jokes and Wisecracks.
The copyright date, 1940, is on the title page.
The strong blue/light green cover shown below is the only one of which I'm aware.
Bantam 6 - 1940