Asakura Yoh is 13 years old at the beginning of the series and a normal sized young man at 5'3". He has neck length dark brown hair and he is constantly seen wearing a pair of orange headphones behind or on his ears.
He normally wears dark green pants, sandals and a dress shirt that was open. He also wore a normal school uniform during his school hours. It would seem he can constantly wear his shirt open as his school has a relaxed attitude towards their uniforms. However when it gets cold Yoh will button his shirt, wear a tie and the standard school uniform jacket. Although of this, he will still wear sandals.
In a battle he wore a black vest and trimmed shorts with an orange lining, and wrap-up sandals. During the second round of the Shaman Fights, he is depicted wearing a shirt with a Funbari Onsen advertisement on it and sweat pants with sandals, and long black trousers, also with wrap up sandals.
In between the battles of the Second Round of the Shaman Fights, he wore a yukata, a blue robe tied together with an orange sash around the waist, where he keeps Amidamaru's memory tablet. Around the chest of his robes is yet another advertisement for Funbari Onsen. Over his shoulders he wears a black cape and carries his headphones around his neck