The image is here, from the original post here.
It looks to have been reproduced from some sort of old text. It looks like some sort of marine national flag identification chart, and includes what look like Cromwellian-era English flags with the St. George's Cross in the canton, alongside English/British royal standards and the flag of the Scottish Darien colony. Which suggests that it doesn't necessarily represent a snapshot of all of the flags around in a specific timeframe.
The only reference I can find to an illustration of the flag of Darien is a 1975 volume called "Flags Through The Ages And Around The World" (Whitney Smith) but this illustration looks much older, especially given it's in French with (by today's standards) some unconventional spellings...
For anyone that hasn't figured it out yet from the repeating images, this is a gift wrap. From the website:
Cartonotecnica Rossi has been producing high quality, finely printed decorative papers since 1931. The mill purchased La Dordoni, a museum in Milan that houses over 6000 decorative papers, invitations and stationery, many of which date back to the renaissance. The museum collection provides a source for reproductions of traditional designs as well as an inspiration for new designs.
The source for the images appears to be this 18th century table of naval ensigns, or a copy thereof, from 1725.
