You could always try them. But I doubt they'll fit.
Attends has youth disposable diapers that will surely fit him and without the babyish designs which I'm sure he'll hate with the huggies or pampers.
Here's some info on Attends Youth Briefs from Healthykins website. I use them to order attends adult diapers for my mom. https://www.healthykin.com/p-574-attends-youth-briefs.aspx
Attends Youth Briefs from HealthyKin.com provides superior leakage protection, skin wellness, dryness, and odor control. Micropore topsheet ensures fastest possible fluid acquisition. Features our Rapid Lock System, a technologically superior design that includes our patented Perma-Dry fibers.
Attends Youth Briefs Features:
- Made for smaller, petite individuals or adolescents
- Latex free
- Packaged in discreet cases
- 20" - 28" waist