This runner trucker by boco is sized a s\m. The boco running trucker is generally a bigger fit than the technical trucker. I found the running trucker size s\m to fit more like regular size technical trucker and therefore fits more head sizes.
Desert . Original artwork. From Boco:
The Running Trucker provides all the comfort of a Run Hat with the structured front panels and bill of a Trucker. Laser cut panels provide the breathability needed for high output efforts.
- 5-Panel Construction
- Wicking internal sweatband
- Laser-cut side and back panels
- Adjustable Velcro closure
- Sublimated design
- Curved bill
- Hand wash