Join Date: Jun 2005
Bikes: 1990 Trek 1500; 2006 Gary Fisher Marlin; 2011 Cannondale Synapse Alloy 105; 2012 Catrike Trail
I'm not as small as you, though I should be (same height, currently 204), and I've found only one consistent characteristic of cycling jerseys - they nearly all are smaller than street clothes of the same size designation, and I don't mean just what you would expect in order to avoid loose, flapping fabric in the breeze. I mean substantially smaller. I wear L shirts of every kind, but find that I need at least an XL when it comes to jerseys. And even that varies depending on their cut (club vs race, etc.) and even between brands. Most of my P-I, Primal and Primal-sourced club jerseys are XL, but some others brands I need an XXL to get the same fit. I've even run into a little bit of inconsistency from Primal, with one particular XL being quite a bit tighter than my others, even though it's supposed to be club cut like the rest.
So I'd say it's kind of all over the map, but the given in the whole equation is the label on the jersey is going to appear larger than it does in your shirts. I've learned not to get to emotionally invested in the letters on the label. It's just kind of a pain in the butt to have to second-guess your purchases.