Summer sports clothes for men and women, Delineator, July 1926.
Alternate views of Butterick patterns for golfers, July 1926. Knickers 4147 and 3496. The girl in a pleated skirt has a boyish shingle haircut.
Golf, tennis, swimming, riding, hiking, camping: there were Butterick patterns for most summer sports. A two-page layout in Delineator from July, 1926, gives an idea of what to wear and how to accessorize it.
Don’t forget some lively socks!
A necktie is also appropriate:
Women golfers wear neckties with their golf clothing. July 1926.
The presence of blazers on all ages is probably a British influence (Butterick sold patterns in England and other countries, not just the U.S.) or an exclusive “private school” signal.
Tennis: Blazer 4458 for a boy, with knickers 5950; blazer 5246 for a girl, over dress 6851, worn with stockings rolled. July 1926.
Man’s blazer 6033
Blouse 6876 and knickers 3496, for golf or hiking. And a necktie….
A gym suit (Butterick 4152) or a matching middy blouse and knickers (Butterick 4552) were appropriate for camping and hiking. Illustration from 1926, but pattern 4152 first appeared in 1922-23.**
I wrote more about the knicker outfit, with many photos of my aunt wearing similar clothing in the 1920s.
My aunt with her future husband and her mother, 1919.
Riding habit (Butterick 4004,) necktie [what, no monocle?] and a spectator sport dress (Butterick 6918.)
Bathing suits 5204, 6809, and 6822. Butterick patterns illustrated in Delineator for July 1926.
Bathing suit 5204 has a higher waistline; the belt covers the seam where the “tights” are attached — and, although the other bathing suits were brand new in 1926, No. 5204 first appeared in 1924.**
** The range of pattern numbers on these two pages (Delineator, July 1926, pp. 34 & 35) show that many of these patterns were “standards” that had been in the catalog for several years. Numbers lower than 4988 pre-date 1924, and bathing suit 5204 first appeared in 1924. The riding habit dates to 1922. (Source: Commercial Pattern Archive at University of Rhode Island. These specific patterns aren’t in their collection, but the number sequence is very clear. )
witness2fashion 
I must say, in these illustrations the ladies are completely flat-chested! Even the man has more shape in the chest area. Glad to see that the actual women in the photo still had all the usual female chest attributes though. 😉 Those drawings completely mis-represent the fit of the patterns!
Butterick patterns eventually added a one and a half inch seam allowance in the hip area during the twenties. I need to write about that “fitting” article.
There does seem to be a masculine ideal for a lot of the women’s sporting illustrations–especially the drawing of the woman in the riding outfit with very short hair. But that was certainly the 1920s boyish style
I agree that there is a [possibly unconscious] message in the neckties: sports (and freedom) are not for men only. Funny that an inconvenient and uncomfortable male accessory was chosen to carry the message!
There are some really interesting details in the descriptions of the swimsuits. First, this is a very early use of the word “shorts”. The use of trunks is much more common in 1926. I also love the reference to wearing a wrap around skirt to the beach. This idea did not catch on until the early 1930s!
It sure looks like the bloomer is dead, having been replaced with trunks!