An excellent primer on suiting.

[Chorn]

Informative and a decent read.

Shirt collars (the weakest of the articles)
http://parisiangentleman.co.uk/2013/04/15/cuffs-ruffs-contours-dressing-mens-necks/

Shoulders
http://parisiangentleman.co.uk/2013...t-sings-the-second-signal-of-a-handmade-suit/

Collar Gap
http://parisiangentleman.co.uk/2013/04/18/zero-collar-gap-the-third-signal-of-a-good-handmade-suit/

Well, given that it isn't particularly thorough, perhaps "primer" is the incorrect word. Still. Whatever.

 

[Grand Potentate]

Cross posting this one: The illustrated pictures are very valuable here:

http://www.artofmanliness.com/2013/09/25/good-fitted-suit-visual/