A full set of forty modern International maritime signal flags in a roll.
One of the images shows the size of one of the letters. The flag measures across the top approx 12".
The roll when open measures 108cm long x 42cm wide.
Rolled up they're a neat 20cm x 20cm x 15cm.
Not shown in the image there is a blue velcro bag they store in, same colour as the roll.