Menswear-inspired patterns were prominent in the Fall 2019 shows but buffalo and jockey-like checkerboard patterns really stood out this season in Paris.
The entire Dior show revolved around checks and bucket hats. (The hats were amazing!)
Nicholas Ghesquiere's Louis Vuitton is a bellwether for everything, IMHO. You can see the checks on the cardigan layered under the v-neck but it was on several non-knit pieces throughout the collection as well.