This wiki is a real-world reference to help PHers decide which size jersey is going to be best for them.

Member (optional)	Height	Weight	Jersey	Size	Comments
Gruffy	6'4"	80kg	Regular	L	Fits closely all over but isn't race-tight
Gruffy	6'4"	80kg	Pro-cut	7	Fits well around chest, little loose around mid-section, bicep and neck but not enough to want to go down to a 6
Steve vRS	5'10.5"	77kg	Regular	L	Comfortably loose
Steve vRS	5'10.5"	77kg	Regular	M	'Race fit' - a challenge for the zip!
hora	6'2"	96kg	Regular	XL	Felt like I'd been poured into it. But alittle bit more and it'd be spot on
Kell	5'11"	100kg	Regular	XXXL	A little baggy in most places bar my fat stomach and my amazing guns - I wouldn't have wanted one any smaller