T-shirt with "I would,but I'm training dogs that day"
 
Features 
165gms Combed Cotton (100%)
Unisex
Taped Shoulders & Neckline
Double Stitched Hem On Waistline & Sleeves
Side Seams
 
How to measure - Take your favourite shirt and lay it on a flat surface, measure the shirt from armpit to armpit, match the measurement to the size chart.
 
XS - 47cm
S - 50cm
M - 53cm
L - 57cm
XL - 61cm
2XL - 65cm
3XL - 69cm
4XL - 73cm