I had to return the medium as it was to tight in the chest and under the arms. The large size arrived in two days and fits perfectly especially with a base layer. FYI I’m 5:10 148 lbs but with wide shoulders. Since you will be wearing the vest over a base layer you may need to size up.
best cycling clothing
I often purchase Giordana for my partner and myself. The quality of the Giordana is top-shelf so as they say "you get what you pay for"....this vest is worth every penny and then some. I only ride in Giordana cycling clothing and it comes down to fit, quality and design so you can't lose when you ride in Giordana cycling clothing! Chris Carmichael