Lot of info on the site, for example 5’10" 160lb guy modeling Pro jersey:
all my Voler jerseys are Pro race fit XL. The big guy modeling on that page is +35lb and same height, and we are wearing same size even though fit guide by chest measurement I should be wearing 2XL. Given my larger chest its a tight aero fit.
You can call them as well, for in between sizes or questions about the fit guide.
Scroll down this page:
for a link with model about your size in the Velocity.
My local LBS uses Voler for their kit, and at least in race fit, I find they fit very similar in size to most other brands. Small in Voler, small in Le Col, Santini, Castelli, etc. I haven’t bought a jersey in a couple years, so if things have changed disregard, but I have historically found Voler jerseys to not be quite as stretchy or tight (for race fit) as as other brands. I haven’t found this to be a problem necessarily, but just something to note.
I actually found a helpful video that shows the fit of some of their stuff. Steered me off the Velocity one real quick and back to the Pro. Older vid but still helpful