The Regency tailcoat below can be made with the Country Wives Tailcoat Pattern and I recommend the Kannicks Korner waistcoat pattern for an accurate period style.
|Aylwen & John Gardiner-Garden, December 2011|
Suzi Clarke wrote an excellent article To Cut a Regency Coat where she goes in-depth on the inner workings of the regency tailcoat. Other books that I use regularly for making men's outfits from this period are Federalist & Regency Costume 1790-1819 and The Cut of Men's Clothes 1600-1900. Another book that is often a help, but a bit late for this period is Men's Garments 1830-1900 .
These tailcoats are less tailored than the formal jackets of today, and the construction requires you to work differently to what you expect.
Below are some pictures Aylwen has been collecting over the years. These will help you work out what colour wool you want, plus to start thinking about buttons, trims, waistcoat colours and so on.