Size Chart - Old Guys Rule

✔ True to size — comfortable relaxed fit

Relaxed tee fit designed for easy everyday wear over a singlet or on its own.

Measurement guide (all measurements in cm)

How to measure

Lay a t-shirt you already own flat and measure across the chest from armpit to armpit to compare with the half chest measurement above.

Measure across the shoulders seam to seam, then from shoulder seam to sleeve edge for sleeve length.

Measure from the top of the shoulder down to the hem for overall length.

These measurements reflect garment measurements taken with the t-shirt lying flat.

If you're between sizes, most customers choose their regular size.