The three words get used as if they mean the same thing. They do not, and the difference shows up in a tape measure long before it shows up in a photo.
Regular fit
The shoulder seam sits on the bone, at the corner of your shoulder. The body follows the line of your torso and narrows slightly towards the waist. Length stops around the hip. It is cut to trace you.
Boxy
Boxy describes the shape of the body panel, not the size of the garment. A boxy piece is close to a rectangle: the width across the chest is high relative to the length, and it does not taper at the waist. You can have a boxy piece that is not oversized — a cropped, wide, short tee is boxy and small at the same time.
Boxy is a ratio. Divide the chest measurement by the length and you get a number that tells you more than any product photo. The Essential Oversized T-Shirt in size L measures 62 cm across the chest and 75 cm long, which is 0.83. The Essential Oversized Hoodie in the same size is 74 cm by 66 cm, which is 1.12 — wider than it is long. That is a genuinely square piece, and it is why the hoodie reads heavier in a photo even before you know what it weighs.
Oversized
Oversized means the pattern is cut larger than your body across the shoulder and the chest, on purpose, at every size. The tell is the shoulder.
The dropped shoulder is the tell
On a regular shirt, the shoulder seam and the chest measurement are far apart: the shoulder is narrow, the chest is wide. On an oversized piece they converge, because the shoulder is deliberately extended down the arm.
At size S, the Essential tee measures 56 cm across the shoulder and 57 cm across the chest. One centimetre apart. That seam lands on your upper arm rather than the corner of your shoulder, and that single change is what makes the sleeve fall instead of stand, and what makes the body drape instead of pull.
It is also why sizing up in a regular tee never gives you this. Sizing up moves every measurement at once. Dropping the shoulder moves one, and it is the one that matters.
Same brand, same label, different cut
Two pieces from the same line at the same size S:
| Length | Chest | Shoulder | |
|---|---|---|---|
| Essential Oversized T-Shirt | 71 cm | 57 cm | 56 cm |
| Washed Oversized Set, tee | 66 cm | 55 cm | 53 cm |
Five centimetres shorter, two narrower in the chest, three narrower in the shoulder. Both are oversized. The set tee is cut shorter because it is meant to sit over a matching short, and a long hem over a short leg makes the shorts disappear. Small numbers, completely different look on.
The lesson is not that one is better. It is that "oversized" on a label tells you almost nothing, and the measurement table tells you everything.
Which one you actually want
- Regular if you want the shirt to follow your build, or if you are layering it under something fitted.
- Boxy if you want width and a defined hem, especially over a short or a wide trouser. It is the cut that keeps proportion when everything else you are wearing is loose.
- Oversized if you want the shoulder line to sit low and the fabric to move. It is the most forgiving of the three, and the one that depends most on the fabric being heavy enough to hold the shape.
That last point is the part people miss. An oversized pattern in thin cotton does not look relaxed, it looks like a shirt that lost its shape. The cut writes the cheque and the fabric has to cover it.
More: what GSM means and why 300 changes the shirt, and how to pick your size.
See the cuts side by side in the Essentials line and the sets.
