Flag of Indonesia
The national flag of Indonesia is a simple bicolor with two horizontal bands, red (top) and white (bottom) with an overall ratio of 2:3.[1] It was introduced and hoisted in public during the proclamation of independence on 17 August 1945 at 56 Proklamasi Street (formerly Pegangsaan Timur Street) in Jakarta, and again when the Dutch formally transferred sovereignty on 27 December 1949. The design of the flag has remained unchanged since.
Use
National flag and ensign 
2:3
11 November 1293 (Majapahit Empire)
28 October 1928 (standardized)
17 August 1945 (original)
17 August 1950 (official)
A horizontal bicolour of red and white
The flag of Indonesia is graphically similar to the flag of Monaco, with a slight difference in the shade of red, and ratio of its dimensions. The flag of Poland has similar dimensions but has the colours reversed: white on top and red on the bottom. In both Monaco's and Poland's flags, the reds are of a slightly darker shade than that of Indonesia. The flag of Singapore has the exact same dimensions as Indonesia's, but supplemented with a white crescent moon and five stars in a pentagram at the upper left corner of the flag, of which the red is of a slightly lighter shade.
The "Naval Jack of Indonesia" is reserved for sole use by the Indonesian Navy. It flies from the jackstaff of every active Indonesian warship while anchored or moored pierside and on special occasions. The design of the jack is described as nine alternating stripes, consisted of five red and four white stripes. It is nicknamed Sang Saka Merah Putih, lit. 'The Heirloom Red-White'. The naval jack dates to the age of Majapahit Empire. This empire, renowned for its great maritime strength, flew similar jacks on its vessels.[2]
![Flag of Indonesia used 17 August 1945 – present[15]](http://upload.wikimedia.org/wikipedia/commons/thumb/9/9f/Flag_of_Indonesia.svg/120px-Flag_of_Indonesia.svg.png)
Practice flag used for national flag replacement during rehearsals
Name[edit]
According to Article 35 of the 1945 Constitution, the official name of the flag is Sang Saka Merah-Putih. The flag is commonly called Bendera Merah-Putih ('Red-and-White Flag'). Occasionally, it is also called Sang Dwiwarna ('The Bicolour'). Sang Saka Merah-Putih refers to the historical flag called Bendera Pusaka ('Heirloom Flag') and its replica. The Bendera Pusaka is the flag that was flown in front of Sukarno's house after he proclaimed Indonesia's independence on 17 August 1945. The original Bendera Pusaka was sewn by Fatmawati and was hoisted every year in front of the Merdeka Palace during the independence day ceremony. It was hoisted for the last time on 17 August 1968. Since then it has been preserved and replaced by a replica since the original flag was deemed to be too fragile.[1]
Media related to National flag of Indonesia at Wikimedia Commons