CREATE TABLE table_6587 ("Release date" TEXT, "Length" TEXT, "Director ( s ) " TEXT, "Character name" TEXT, "Character type" TEXT, "Leading lady" TEXT)

What is the length of the film with the character type being a milkman turned prizefighter?
SELECT "Length" FROM table_6587 WHERE "Character type" = 'milkman turned prizefighter'
SELECT "Length" FROM "table_6587" WHERE "Character type" = 'milkman turned prizefighter'