Who is the tallest Jujutsu Kaisen character?

The tallest characters are Satoru Gojo, Aoi Todo, and Panda, all listed at over 190 cm (6'3"+).

How tall is Yuji Itadori?

Yuji Itadori is 173 cm (5'8") tall.

Megumi Fushiguro is 175 cm (5'9") tall.

Nobara Kugisaki is 160 cm (5'3") tall.

Satoru Gojo is over 190 cm (6'3"+) .

Yuta Okkotsu is almost 180 cm (5'11") .

Kento Nanami is 184 cm (6'0½") .