Flag of the Malaysian state Sabah. Based on a GIF from a government website, colors from a photo. Drawn by Mysid. The flag was adopted September 16, 1988.

The mountain on the left is Mount Kinabalu.Per the Constitution of the State of Sabah:

"The State Flag is in a rectangular shape and is in the proportion of 1:2. The canton which extends at the head half way to the fly and 2/3 at the hoist to the foot is in Icicle Blue (C1T9) as the background to a graphic silhouette of Mount Kinabalu which is in Royal Blue (B10) positioned at ¼ of the height of the canton from end to end. The fly of the flag is divided equally into three bands of colours the foot division of which extends right to the hoist. The top band is in Zircon Blue (C5T5) the second band is in white and the third band is in Chili Red (S6R4)."
Originally from en.wikipedia; description page is (was) here. Dimensions from http://www.crwflags.com/fotw/flags/my-sabah.html
User Mysid on en.wikipedia