ShakespearesWords.com

hair / hair's breadth, to a

Old form(s): haires bredth, hayre

in every little detail, in full, exactly

MW IV.ii.3	[Falstaff to Mistress Ford] I profess requital to a hair's breadth
TC III.i.141	[Paris to Pandarus, of remembering Troilus' excuse] To a hair