What's the difference between Shirt and Tshirt?

Tee Shirt Fit Guide: Signature, Classic, Relaxed

Difference Between a Slim Fit and Regular Fit Shirt – MENSWEARR

Patriotic American Eagle T-shirt, 44% OFF

Slim Fit vs. Regular Fit T-Shirts

Difference between shirt and T-shirt - Espresso English

T-Shirts vs Shirts - What's the Difference?

V Neck vs. Crew Neck T-shirts for Summer

T-Shirts vs Shirts - What's the Difference?

Tee shirt vs. T-shirt in English

31 Types of T-shirts - Necks, Fits, Lengths, Decorations

Different Types of T-shirts with Lots of Graphics - Textile Learner

Difference between shirt and T-shirt - Espresso English