Sizing 101: Built to Move, Designed to Fit
We’ve reinvented schoolwear sizing so you can find durable, stylish clothes that boys feel confident in, ready to tackle whatever the day throws their way.
Three Fits to Match Every Frame

Slim Fit
For taller, leaner boys who need a more tailored fit. Slim has a smaller waist and narrower cut through the hips and thighs—streamlined without sacrificing stretch. No more sizing down just to make things stay up.
SHOP SLIM
Regular Fit
The classic cut for average builds. Fits comfortably through the waist, hips, and legs with performance stretch that moves with him all day. No fuss, no adjusting—just an easy, everyday fit.
SHOP REGULAR
Relaxed Fit
Extra room where it counts. Relaxed offers more space in the waist and thighs without the bulk—perfect for broader builds and all-day movement. No more sizing up just to make things fit right.
SHOP RELAXED
How to Measure
Waist: Measure around the narrowest point of the torso (just above the hip bones).
Hip: Wrap the tape around the fullest part of the hips.
Inseam: From the top of the inner thigh down to the ankle bone.
Chest: Around the fullest part of the chest, under the arms.
Compare measurements to our chart to choose both the right numeric size (5/6, 7/8, 9/10, 11/12, 13/14) and the ideal fit (Slim, Regular, Relaxed)
Still Unsure?
Our Style Crew is here to help! Email us at support@studyhallkids.com for personalized sizing advice. Because getting the right fit means getting the most out of every school day.
Tried our fits already? We’d love to hear how they’re working for you.