UBB.threads Forums General Militaria Flags, Field Gear, and Miscellaneous Militaria and Regalia Forum DAF Flag

Wow that's impressive. Going by the std ratios that would have been 20' wide!!
Here's a quick conversion guide for standard flag sizes:

Size in cm & Conversion to inches
50x85 = 19x33
80x135 = 31x53
100x170 = 39x66
150x250 = 59x98
200x335 = 78x132
300x500 = 118x196
400x670 = 157x263
450x750 = 177x295