There is also the splendid WW2 story of someone deciding that an extra large condom would be ideal for keeping mud out of a sten gun if special forces had to go through a stream. Reputedly, the order for "specials" from the London Rubber Company reached Churchill's desk, and he approved it "On condition that they are labelled 'Made in Britain' and 'Medium size'".
Back in the 1970's one of my colleagues was using "standard" ones to measure gas leakage from industrial plant.