While most Korean boy bands at the time depended on the "cute" image concept to attract audience and fans, Big Bang instead adopted the "hip hop" image concept, with some of the members slanting their caps in many promotional photos and even having cornrows (most notably Bae) during the early days of their career.

The group continued this image concept for the rest of 2006 & into 2007 until the release of their mini-album Always, which showcased the group in a more preppy-ish punk style, sporting modern day fashion (such as the skinny jeans with the converse as seen within the music video of their song "Lie"). Moving further away from the "thug" look, Tae Yang also cut off his cornrows into a buzz cut.

Big Bang's unique and urban hip-hop sense of style has quickly become popular in Korea as a result, known as the "Big Bang Fashion." Usually, the group prefers brands such asBape, 10 deep, Louis Vuitton, Vivienne Westwood, Phenomenon, and others and are often seen in customized printed hoodies. The group has been noted as well to have brought back the old school fashion, high-top shoes, such as the Nike and Reebok high-top shoes.

Leader G-Dragon is consider by many to be the most fashionable one of the group, where he tends to wear triangular scarves (Mufflers) around his neck, known as "Big Bang scarves" or "Jung Ryu Won scarves", when the actress of the same name began to sport them as well.
Additionally, member T.O.P. is also seen sporting sunglasses, especially those worn by American rapper Kanye West. Big Bang's fashion trend is well known throughout the internet fashion portals, thus making them one of the most sought after artists for endorsement products.

The group's unique imagery and fashion has led them to release their own fragrance, entitled "BB Bud's My First Fragrance (나의 첫번째 향기" in early 2007.

When Big Bang began their promotion for the song Last Farewell, they created a trend now commonly known as “colornized.” The style refers to fluorescent colorful jackets and shoes that do not necessarily match. The same style later spread to Japan and The United States as Big Bang released their first ever English album, “For The World”.

During the 2008 Mnet! Hot 20 award G-Dragon performed in an John Galliano original that created commotion among Korean citizens. The shirt included a button expressing “I Heart SEX”. After the pictures of the show was published on the web, G-Dragon became the most searched artist on the Korean web for a whole month.