Interestingly, Molla Bjurstedt (later Mallory), the Norwegian-born and US-naturalised player who was on the other side of the net in one of Lenglen’s more controversial matches (when she retired citing shortness of breath after losing the first set against Mallory in the 1921 US Open), notes in her “Tennis for Women” that she had a preference for a 13.5 oz racket and suggests that Wightman, among others, were of the same mind.
Bjurstedt differed from Lenglen in preferring a head heavy racket though this is consistent with her reputation as a baseline with a punishing forehand drive (per Tilden in “The Art of Lawn Tennis” (1922): “She has no service of real value. Her overhead is nil, her volleying is mediocre; but [she has] marvellous forehand and backhand drives […]”).
She also goes in for a “small” handle - just the 5 1/8 inches…