Sirumoni Doley (Oct  23, 1993)  and  Kanhaya Thakur (March 01, 1992) from Kamrup, Assam, have created a record by making largest painting brush measuring  length of 27.60 mtr and breadth of 0.86 mtr. The same was used for painting and exhibited at Sonapur Higher Secondary School, Sonapur, Kamrup, Assam on 29th July 2017.

http://indianachieverbookofrecords.com/largest-painting-brush/