An unbranded T-shirt like this one is perfect for a lazy Sunday.
Bella Canvas Premium Unisex Triblend Jersey Sleeveless XS-XL Tank Top R-3480
You will find that M is a safe bet if you’re unsure about sizing.
Roberto Cavalli Men’s Black Graphic Lion Crewneck T-Shirt Size S M L XL 2XL
You will find that the sizing runs consistent, helpful for men ordering online.
Mens New Tupac Shakur 2PAC Rapper Black Blue T-Shirt Size S M L XL 2XL
What I like is the lack of logos, which men often prefer for a clean look.
Roberto Cavalli Men’s Black Graphic Crewneck T-Shirt Size S M L XL 2XL
This shirt is designed for men, so the length works with most pants.