I thought the following recent article on the 'Novosti Donetska' site to be quite revealing. I've translated portions below:
"Logvinenko, Bliznyuk and Lukyanchenko to unfurl largest [Ukrainian] national flag in the world
Ukrainian National Flag Day celebrations will take place in front of the Donetsk Oblast State Administration building, with the participation of the chairman of Donetsk O.S.A. V.I. Logvinenko, chairman of the Donetsk Oblast Council A.M.Bliznyuk, and Donetsk city head A.A.Lukyanchenko, on August 23 starting at 9.00 a.m.
Together with the representatives from oblast community youth organizations and those of Donetsk, the oblast and city leaders will assemble around the flag - the symbol of the unity and consolidation [sobornost] of Ukraine. The flag measures 30X45 m.
The next day, on August 24, [Independence Day] at 15.00, the largest national flag of Ukraine in the world will be carried along Khreshchatyk by representatives of all-Ukrainian community youth organizations to the Maydan Nezalezhnosti where leaders of state, well-known politicians, businessmen, artists and athletes will join the celebrations...
The article goes on to expain that the initiative to manufacture this flag came from Donetsk in 2007, and it has since been unfurled at at various historical remembrances, at historical sites etc. The flag was sewn by a Donetsk miner's widow and was later displayed around the country by young people from that city.
p.s. Also check out this from today's FT, which may or may not be connected to the above..