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Size Guide
Garment measurements for every fit and fabric we make, in inches and centimetres. These describe the shirt laid flat, not your body — the quickest way to choose is to compare them with a shirt you already own.
Sizes we carry
WearBN uses six confirmed blanks — unisex adult, women’s adult and youth, in Cotton and Performance. Every chart below is taken from that garment’s published manufacturer specification, checked on 19 September 2026.
Each design is made in one adult fit, unisex or women’s, and that fit is fixed for the design — you do not choose one. The fabric and size you pick decide the rest. Youth sizes are a single unisex youth cut in both fabrics.
Once production begins, we do not accept exchanges for customer-selected sizing. If WearBN supplies a size different from the one ordered, we replace it at no charge, including any necessary shipping.
- Unisex Adult sizes: S, M, L, XL, 2XL, 3XL, 4XL.
- Women’s Adult sizes: S, M, L, XL, 2XL, 3XL.
- Youth Unisex sizes: YS, YM, YL, YXL, in both fabrics.
- Each design is made in one adult fit, shown next to the size selector on the product page.
Choose your chart
Pick the fabric and the size range you are buying, then open that chart.
How to measure
These are garment measurements, not body measurements. They describe the shirt laid flat.
Each chart states its own method. Our two fabrics are documented differently by their makers, and one of them does not say where the chest is taken, so there is no single way to measure that applies to all six charts. Use the note printed underneath the chart you are reading.
Comparing with a shirt you own. Measure your own shirt at the points that chart names, then match the closest size.
Chest width is half of the way around the shirt, so double it to compare with a full chest measurement.
Cotton — Unisex adult
The adult unisex cut, straight through the body.
| Size | Chest width | Body length |
|---|---|---|
| S | 18″45.7 cm | 28″71.1 cm |
| M | 20″50.8 cm | 29″73.7 cm |
| L | 22″55.9 cm | 30″76.2 cm |
| XL | 24″61.0 cm | 31″78.7 cm |
| 2XL | 26″66.0 cm | 32″81.3 cm |
| 3XL | 28″71.1 cm | 33″83.8 cm |
| 4XL | 30″76.2 cm | 34″86.4 cm |
How this chart is measured. Body length is measured from the high point of the shoulder.
Not specified by the maker. The maker does not say where on the garment the chest width is taken. Use these figures to compare one size with the next rather than as an exact target.
Performance — Unisex adult
The adult cut in the performance fabric.
| Size | Chest width | Body length |
|---|---|---|
| S | 20″50.8 cm | 28″71.1 cm |
| M | 21½”54.6 cm | 29″73.7 cm |
| L | 23″58.4 cm | 30″76.2 cm |
| XL | 24½”62.2 cm | 31″78.7 cm |
| 2XL | 26″66.0 cm | 31¾”80.6 cm |
| 3XL | 27½”69.9 cm | 32½”82.6 cm |
| 4XL | 29½”74.9 cm | 33¼”84.5 cm |
How this chart is measured. Chest width is measured with the garment laid flat. The maker allows up to ½ inch either way on the chest and ¾ inch on the length.
Not specified by the maker. The maker does not say at what height the chest is taken, or where body length is measured from. Use these figures to compare one size with the next rather than as an exact target.
Cotton — Youth
The youth cut of the same cotton tee.
| Size | Chest width | Body length |
|---|---|---|
| YS | 15¼”38.7 cm | 20⅞”53.0 cm |
| YM | 16¼”41.3 cm | 22⅛”56.2 cm |
| YL | 17¼”43.8 cm | 23⅜”59.4 cm |
| YXL | 18¼”46.4 cm | 24⅜”61.9 cm |
How this chart is measured. Chest width is measured one inch below the armhole. Body length is measured from the high point of the shoulder.
Performance — Youth
The youth cut in the performance fabric.
| Size | Chest width | Body length |
|---|---|---|
| YS | 16″40.6 cm | 20½”52.1 cm |
| YM | 17″43.2 cm | 22″55.9 cm |
| YL | 18″45.7 cm | 23½”59.7 cm |
| YXL | 19″48.3 cm | 25″63.5 cm |
How this chart is measured. Chest width is measured with the garment laid flat. The maker allows up to ½ inch either way on the chest and ¾ inch on the length.
Not specified by the maker. The maker does not say at what height the chest is taken, or where body length is measured from. Use these figures to compare one size with the next rather than as an exact target.
Cotton — Women’s
The women’s relaxed cut in cotton.
| Size | Chest width | Body length |
|---|---|---|
| S | 18½”47.0 cm | 25¼”64.1 cm |
| M | 20″50.8 cm | 26″66.0 cm |
| L | 22″55.9 cm | 26¾”67.9 cm |
| XL | 24″61.0 cm | 27½”69.9 cm |
| 2XL | 26″66.0 cm | 28¼”71.8 cm |
| 3XL | 28″71.1 cm | 29″73.7 cm |
How this chart is measured. Chest width is measured one inch below the armhole. Body length is measured from the high point of the shoulder.
Performance — Women’s
The women’s cut in the performance fabric.
| Size | Chest width | Body length |
|---|---|---|
| S | 17½”44.5 cm | 24½”62.2 cm |
| M | 19½”49.5 cm | 25″63.5 cm |
| L | 21½”54.6 cm | 26″66.0 cm |
| XL | 23½”59.7 cm | 27″68.6 cm |
| 2XL | 25½”64.8 cm | 27½”69.9 cm |
| 3XL | 27½”69.9 cm | 28″71.1 cm |
How this chart is measured. Chest width is measured with the garment laid flat. The maker allows up to ½ inch either way on the chest and ¾ inch on the length.
Not specified by the maker. The maker does not say at what height the chest is taken, or where body length is measured from. Use these figures to compare one size with the next rather than as an exact target.