Despite having the appearance of a child, Meliodas is much older, being more than three thousand years old. Meliodas is exceptionally short compared to other characters, with messy blond hair and a pair of emerald eyes. Meliodas also lacks facial hair, further accentuating Meliodas adolescent appearance. Regardless of his stature and youthful looks, Meliodas is relatively muscular, possessing an array of well-developed abdominal muscles. Meliodas often wears an ordinary, clean white button-front shirt and a black sleeveless vest on top with a loosely worn tie. Meliodas Broken Sword's scabbard is held on by a green leather belt with gold-colored buckles. Without any socks, Meliodas wears a pair of black boots. Meliodas most distinctive trait is Meliodas Dragon symbol carved at the top of Meliodas left bicep, just below Meliodas shoulder.
When Meliodas was the leader of the Ten Commandments, Meliodas wore a white, sleeveless coat adorned by a batch of black X-shaped buttons from all around the high collar, black lining on the coat, a dark red color on the inside, and a coat's tail. Meliodas also had black pants with matching colored boots. Meliodas also wielded a large, yet sleek sword, but during his battle with Elizabeth against the Demon King and Supreme Deity it was destroyed.
During Meliodas tenure as the leader of Danafor's Holy Knights, Meliodas wore their traditional armor, much like Cain Barzad's. Ten years ago Meliodas wore a full-body silver armor with a unique helmet, like the rest of the Sins. Meliodas also wielded a dagger that appeared to be Meliodas Sacred Treasure. Meliodas was issued a wanted poster, like the rest of the Sins, after being framed for the murder of Great Holy Knight Zaratras. The most current issue of Meliodas wanted poster does not accurately depict Meliodas but, coincidentally, does depict his brother, Estarossa.
After the Kingdom Infiltration arc, Meliodas sports a new outfit; a long-sleeved, high-collared white tunic over an undershirt, a pair of gloves, knee-length black pants, and black boots. This outfit is a bit more formal like a uniform with the "Boar Hat" embroidered on Meliodas back.
After Meliodas time in Purgatory, Meliodas now has seven permanent scars where his hearts are located and sports a new Black Mark similar to the one he previously had as leader of the Ten Commandments. Meliodas now wears the debut outfit he previously wore.
In Meliodas Assault Mode, Meliodas shroud himself in darkness. This takes the appearance of a vest-like coat that only covers Meliodas armpits, which flares out at ragged ends, and has a very high collar which is spread wide. Meliodas also has two wrist bands, made up of the same darkness as the rest of his clothes. Meliodas pants are connected to Meliodas feet look like a bird's talons, but with five toes.
In Purgatory, Meliodas' emotions wear a V-neck blue vest, made with the skin of indigenous species, that has three silver diamond-shaped buttons; the vest covers Meliodas shoulders and slightly exposes Meliodas chest with a small up-turned collar, and slightly opens at the hem. The blue gloves and knee-length pants have a leather-like appearance to it, and both have the same diamond-shaped button on it. Meliodas also seems to wear shoes, rather than Meliodas usual choice; boots