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Five boys in a library holding books

Because every body is unique and one size rarely fits all.

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

Young boy in a blue patterned shirt and beige pants standing outdoors with greenery in the background

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
Person wearing a gray sweater, beige pants, and white sneakers against a brick wall.

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
Child wearing a blue patterned shirt and beige shorts with a blurred green background

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)

Size Guide

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.