Size and fit guide: how to choose the right size
Real centimeter measurements for every sized product at One of One: the oversized t-shirt, sweatpants, and sweatshorts, plus what's one size across the rest of the catalog.
The oversized Boulevard t-shirt is cut generously by design, so a size that matches your usual label somewhere else can run large here. This guide uses the actual centimeter measurements from our size charts, the same ones shown on each product page, so you can compare against a piece you already own instead of guessing from a letter.
How to measure yourself against the chart
Lay a t-shirt you already like the fit of flat on a table. Measure its length from the shoulder seam straight down to the hem, and its width straight across the chest, just below the armpits. Compare both numbers to the chart below and pick the row that's closest, favoring the larger size if you're between two.
T-shirt sizes (Boulevard, oversized fit)
| Size | Length (cm) | Width (cm) |
|---|---|---|
| S | 70 | 54 |
| M | 72 | 58 |
| L | 75 | 62 |
| XL | 77 | 65 |
| XXL | 79 | 68 |
Length runs from the shoulder to the hem; width is measured flat, side seam to side seam, so double it for a rough chest circumference. XXL is available on four colorways: washed dark grey, skyblue, light grey, and baby pink. The green, white, and black colorways currently run S through XL.
Because the cut is oversized, most people find their usual size already looks relaxed. If you prefer a closer fit, size down one from what you'd normally wear.
Sweatpants sizes
| Size | Length (cm) | Width (cm) | Waist (cm) |
|---|---|---|---|
| M | 104 | 30 | 46 |
| L | 107 | 32 | 50 |
| XL | 110 | 35 | 54 |
Waist is also measured flat, so double it for the actual waist circumference. Sweatpants come in M, L, and XL only, in black or washed dark gray.
Sweatshorts sizes
| Size | Length (cm) | Width (cm) |
|---|---|---|
| M | 55 | 35 |
| L | 57 | 36 |
| XL | 63 | 38 |
The measuring method is the same as the sweatpants: length top to hem, width flat across.
Everything else is one size or a fixed dimension
Bucket hats, the backpack, duffle bag, fanny pack, mini bag, mouse pad, car seatbelt cover, car trash bin, and pencil case are all one size; there's no size chart because there's nothing to choose between. Notebooks come in paper formats instead of clothing sizes (A6, A5, or A4, depending on the notebook), the laptop sleeve is sized by inch to match your laptop (12 through 17), the canvas print comes in two dimensions (20 by 30 cm or 30 by 40 cm), and the ruler cover comes in three lengths (80, 100, or 120 cm).
Choosing between two sizes
Go with the larger size if the piece is meant to be worn loose, which covers most of the apparel here, since the t-shirt and sweatshorts are already cut generously. Go with the smaller size only if you specifically want a tighter fit than the default cut. There's no exchange for a size chosen incorrectly once printing starts, since every piece is made specifically for the order, so it's worth measuring an existing piece of clothing before you confirm.
Fabric and why the fit feels the way it does
The t-shirt uses a Bolivara fabric built for a soft, oversized drape rather than a fitted cut, which is why the chart runs longer and wider than a standard tee at the same letter size. Sweatpants and sweatshorts use a cotton blend with an elastic waistband, so the waist measurement has some give beyond the flat number in the chart.