Jersey Sizing help request: Milltag vs Rapha / Bioracer/ Santini/ Assos

Am looking to order from Milltag but wary of getting wrong size at a £70 hit.

Currently wearing:

Rapha Small
Santini XL
Bioracer 4

Is there a lfgsser out there wearing one or more of the above brands and has Milltag also so can share jersey size comparison knowledge?

Edit Assos Large also

Well, I'm large / Medium in Rapha depending on the age of the jersey / how racey I'm feeling.

my Milltag kits are all large and are roomy. I would say the run true to size. not like the the mental world of santini

Rapha Small = Santini XL?!

Italian sizing taken to the limit

Italian sizes run continuously from child to adult sizes so S, M and L are kids sizes and XL is small adult. I'm M in most brands but XXL in Santini sizes.

Thinking Medium then, if only to complete the size bingo chart.

Thanks all.

Bottled it and ordered Large after spending ages getting confused over these charts:

http://milltag.cc/site/media/themes/milltag/img/sizing_chart.png

http://www.bioracer.co.uk/en/collection/size-chart

http://pages.rapha.cc/service/mens-sizing-guide

I wear a M in Santini (I have a number of their offerings) and that's supposed to reflect a 36-38" chest, which I have. More importantly, I'm 5' 11" and the length is fine, it's fitted without being ridiculously tight, so I can't see how the Medium is suppose to be kid's wear as you say. I don't buy this Italian sizing myth, actually, and find that Santini runs true to size. Same with De Marchi.

Well, maybe they've changed the way they label their products. Looking in my wardrobe, I have 4 jerseys from Italian brands: 3 Santinis and 1 Castelli. I am 5 foot 7, 60kg and 38" chest. 2 of the Santinis and the Castelli are labelled XXL whilst all my non Italian jerseys are M. One of the Santinis was bought in Italy at a shop which stocked all sizes from S to XXXXL. The smaller sizes were definitely for kids. The other Santini is labeled M but it was from Prendas Cyclismo which being a big UK based company can probably dictate how Santinis label their kit for them.

And that concludes the case for the defence, your honour.