Following up on my previous post; Black button-shirt it is (it's a short sleeve)! Now what shorts to wear? Again added details in the description/comments. The white smudges are on the mirror :
Men's Shirt and Shorts Set 2 Piece Button Down Short Sleeve Casual Holiday Beach T-Shirts Shorts Outfits (Color : Beige, Size : M) : Amazon.co.uk: Fashion
How to Wear A Short Sleeve Button Up Shirt for Short Guys (5 Ways)