Sizing Info
All of our shirts and hoodies have a size that is best described as slim or athletic. If you like a looser fit, order a size up. Here are some pictures of me, wearing various styles, and the sizing of the shirt or hoodies - I'm 5' 11" (155cm), and weigh 162 pounds (73.5kg):
Volunteer Knitwear™ VL40 Tee in medium size (printed using Flex):

Volunteer Knitwear™ VL45 Tee in large size (printed using DTG):

Volunteer Knitwear™ VL130H Hoodie in large size (printed using Flex):

As you can see, the medium sizes are pretty tight on my frame. For sizing charts and more info, see the About our Clothing page. It has links to the sizing charts for all the shirts and hoodies we carry.
As a side note, we only "make" about $5 (without paying myself anything for my time) on each item of clothing, so please try to avoid ordering multiple sizes and returning ones that don't fit. That said, we will make every attempt to ensure you are satisfied.