Excerpt from Montana State Flag Code:

"1-1-502. State flag. There is hereby established a state flag of Montana. The state flag of Montana shall be a flag having a blue field with a representation of the great seal of the state in the center and with golden fringe along the upper and lower borders of the flag; the same being the flag borne by the 1st Montana Infantry, U.S.V., in the Spanish-American War, with the exception of the device, "1st Montana Infantry, U.S.V."; and above the great seal of the state shall be the word "MONTANA" in helvetica bold letters of gold color equal in height to one-tenth of the total vertical measurement of the blue field."