Brand: Banana Republic. Style: Mens blazer designed for business or casual wear. Size on tag: 44 (Regular). Color: Blue. Material: Wool. Lining Material: Polyester. Details: Notch lapel, two-button front closure, single-breasted cut, rounded patch front pockets, chest patch pocket, and four-button sleeve cuffs. Features: Two-button front; notch lapel; patch pockets; chest pocket; four-button cuff detailing; full polyester lining; regular fit. Branding: Banana Republic woven label at the interior neckline. Origin and care: See interior care tag for country of origin and complete washing and drying instructions. Use: Versatile blazer suitable for business, professional, or casual wear.

this is the top of another button. it will just snap on. probably from a uniform blazer or other blazer types.