Real Sporting de Gijón have worn red and white striped jerseys since their inception, being the first Spanish team to wear red and white, as both Athletic Bilbao and Atlético Madrid wore blue and white until 1909. The colors are those of the official flag of Gijón, which itself is based on the flag of the maritime province of Gijón, established in 1845.

Traditionally, Sporting wears both blue shorts and socks.

Like most old football clubs, Real Sporting de Gijón did not initially have any badge displayed on their shirts. Their first official badge was introduced in the 1920s. It consisted of a traditionally shaped shield split into three sections, representing the club and the city.

From 1931 to 1936, during the Spanish Second Republic, the badge consisted of a circular shield and had the royal crown in the top replaced by a mural crown.

The club's badge is a triangle with red and white vertical stripes with 'S' (for Sporting) and 'G' (for Gijón) intertwined, in gold, across them. A crown in the top symbolizes the royal patronage.

The official flag of Real Sporting de Gijón consist of, in a rectangular field with ratio 2:3, nine equal horizontal stripes of red (top and bottom) alternating with white. The logo of the club is displayed in the centre.