I estimate this shirt is a size Medium. Reference photos for details.

A Lacoste men's black reversible zip polo shirt. This stylish top features the iconic Lacoste crocodile logo on the hem and a convenient zip closure at the neck. Designed for a regular fit, it offers versatility and comfort. Perfect for casual outings or a sporty-chic look.

Department: Men
Sleeve Length: Short Sleeve
Type: Polo
Pattern: Solid
Material: Cotton, Polyamide
Fit: Regular
Features: 1/4 Zip, Reversible
Neckline: Collared
Fabric Type: Knit
Season: Spring, Summer, Fall, Winter
Accents: Zipper, Logo
Closure: Zip
Collar Style: Spread
Occasion: Casual, Activewear

Keywords: Lacoste polo, mens shirt, zip neck, short sleeve, designer, crocodile logo, sportswear, athleisure, casual wear, golf shirt, tennis shirt, smart casual