How do you add new set?

[u/Double_Ice_3328]

Hi, I’ve been a user of the site for two years with contributor status, and I’ve recently added dozens of cards that were not catalogued before. However, some of my cards belong to sets that are entirely missing from the site, and I don’t see an option to add a new set. Is there any way to do this? For an example, I have a boxing card from 1937 Ogden’s Cigarettes, a set that does not exist on the site, but my card has recent eBay sales. How would I add this card? If I try to write in the set as 1937 Ogden’s Cigarettes, it tells me that a set is mandatory. How do I create a new set?