I tell Dad jokes periodically but only when in my element T Shirt

Allow for a tolerance level of 2.54cm/1in. If you're unsure it's always better to choose the larger size.
Note: These values relate to the individual garment size measurements as shown above.

The Gildan 64000 makes for a great staple t-shirt that complements any outfit. It's made of a heavier cotton and the double-stitched neckline and sleeves give it more durability, so it can become an everyday favorite.

Solid colors are 100% ring-spun cotton
Sport Grey is 90% ring-spun cotton, 10% polyester
Dark Heather is 65% polyester, 35% cotton
Fabric weight: 4.5 oz/y² (153 g/m²)
Pre-shrunk for extra durability
Shoulder-to-shoulder taping
Quarter-turned to avoid crease down the center
Blank product sourced from Bangladesh, Honduras, Haiti, Mexico, or Nicaragua
The male model is wearing a size M. He's 6.2 feet (190 cm) tall, chest circumference 37.7' (96 cm), waist circumference 33.4' (85 cm).

A Length
Place the end of the tape beside the collar at the top of the tee (Highest Point Shoulder). Pull the tape measure to the bottom of the shirt.

B Chest
Measure yourself around the fullest part of your chest. Keep the tape measure horizontal.

C Sleeve length
Place the end of the tape at the center back of the collar, then pull the tape measure along the top seam of the sleeve. When you get to the shoulder hold the tape in place at the shoulder and continue to pull down the sleeve until you reach the hem of the sleeve.