By the Edwardian era, frock coats were almost extinct, being worn mainly for formal occasions only, and by the late 1920's, at funerals in place of morning coats. Frock coats were usually double-breasted with two or three buttons on a side. Button stands were sewn to the front edges. There were buttonholes on each lapel, one to hold a flower. The lapels usually reached to the top buttons and were of the rolled variety faced with silk. The center back vent had two buttons at the head. There could be two pockets in the back pleas with a ticket pocket in the waist seam.
Morning Coats were generally single-breasted with three to four buttons and high lapels early in the century; later the lapels were lowered in cut and were of the roll type. A "V" notch between collar and lapel became usual. In the 1920's, the collars were stepped and the lapels reached the buttons. In the 1920's, morning coats were lined with a black silk and cotton material, but the sleeves were generally lined in checked shiny cotton.
These jackets were slightly longer than in the previous century and again had a center seam down the back. The fronts of single-breasted jackets were slightly curved. Pockets at hip level were often flapped with a ticket pocket just above the right hand one. Breast Pockets were always on the left side. Flaps could be replaced by welts or a piped edge. About 1925 lounge suits became the most popular of men's attire for all occasions. They consisted of jacket, matching waistcoat, and trousers, although for casual-wear, trousers were of a different color.
Tweed Norfolk jackets were worn for sports with knickerbockers until the early 1920's. They were the general wear for golf until 1920 when sports jackets and breeches were worn. By about 1925, "plus-fours" and Fair Isle pullovers became popular, and by the 1930's, trousers and shirts and ties worn under pullovers became the mode.
At the beginning of the century, for a very short time, top frock coats similar to frocks, but longer then double-breasted, were worn without jackets beneath. Still the most popular of coats was the Chesterfield of Chester, single or double-breasted. By about 1923 it was mainly double-breasted with four to six buttons, a velvet collar and three outside pockets, but by the end to the 1920's the coat was shorter-calf length.