Round neck makes you look shorter. V-neck T-Shirt makes you look taller. For the men who are tall wearing v neck tees won't be good choice because it makes them look even taller.
What do you wear under V necks?
Want to get at all those V-neck haters out there? Wear a V-neck T-Shirt with a crew neck t-shirt underneath. You can wear a basic, grey sweater and then almost any t-shirt color will look good with it. To keep it casual, pair your sweater-shirt combo with jeans
Can you wear a polo shirt with a V-neck sweater?
Wear a button up dress shirt or an oxford underneath a sweater, a polo shirt shouldn't be worn over a sweater as the collar of the shirt doesn't have enough structure. This goes for all types of sweaters – crewneck, V-neck, and shawl collar sweaters.