Boxy isn't a bigger fitted tee

Those two shirts are both black cotton t-shirts and they're built from different patterns. Not different sizes of the same pattern — different shapes.

Knowing which one you're looking at explains most of the confusion people have about ordering these.

What actually makes a tee boxy?

Two things, and neither is "bigger".

The shoulder seam is dropped. On a fitted tee the seam sits on the point of your shoulder and the sleeve is set into it. On a boxy cut the seam sits several centimetres out along your upper arm, so the sleeve hangs from a lower, wider line.

The body doesn't taper. A fitted tee narrows at the waist. A boxy one runs straight down from the chest to the hem, which is what gives it the square silhouette when it's laid flat and the relaxed drape when it's on.

The numbers here make the difference concrete: at the same chest measurement, the boxy tee's shoulder is noticeably wider than a straight cut's. Same body underneath, different architecture over it.

Why doesn't sizing up a normal tee do the same thing?

Because you get more of everything, including the parts that shouldn't grow.

Going up two sizes in a fitted tee gives you a longer body, a longer sleeve, a wider neck and a shoulder seam that's now hanging in roughly the right place by accident — but the sleeve is proportioned for a bigger person, so it's long and narrow instead of short and wide, and the length past the hip makes it look borrowed rather than cut that way.

The boxy cut keeps a normal length and a short, wide sleeve while widening the body. That's the combination people are actually after, and it can't be reached by sizing up.

Does boxy mean it's huge on me?

No — and this is the most common ordering mistake in the category.

Because the pattern is already wide, you take your normal size. The relaxed look is built into the cut. Sizing up from there gives you the length problem again, plus a shoulder seam somewhere near your elbow.

If you want it dramatically oversized, one size up is the maximum that still hangs properly. Two is a different garment.

How do I know it'll fit before it arrives?

Measure a shirt you already like and compare, rather than measuring yourself.

A flat pit-to-pit measurement on a tee you own is the single number that predicts how a boxy tee will feel, and it takes twenty seconds with a tape. Then check whether the chart you're comparing it to gives the full circumference or the flat width — they differ by a factor of two, and mixing them up is the most common sizing mistake there is.

The full method is worth its own five minutes, and it's much more reliable than a size letter, which means different things at every brand.

Does the cut change how a print looks?

Yes, and it's a real advantage of this shape.

A boxy tee has a wide, flat chest panel with no taper pulling at it, which means a chest print sits square instead of curving away at the sides. Large type especially benefits — a word set edge to edge stays straight rather than bending around the body.

That's why type big enough to run off the shirt works better on this cut than on a fitted one.

Who does it suit?

It's a shape rather than a size, so the honest answer is that it depends on what you want it to do.

The drape is the point: it skims rather than follows, which is why it reads as relaxed on basically everyone and why it's become the default cut for graphic tees. If you want a garment that shows your shape, this isn't it, and a fitted tee is a perfectly good object.

The heavier the cotton, the more the boxy cut behaves — weight is what stops a wide shirt looking like a bag. That's the other half of the equation.

How do I get one made?

Describe the design at JustOG, pick the garment and size, drag the crop frame, and see it composited on the real thing before you order. It's made to order and shipped.

Designs other people have published are in the shop.

It isn't a bigger shirt. It's a different one, cut to hang instead of to fit.