In Bella+Canvas men's/unisex, an adult XS fits a 31-34 inch chest (79-86 cm) and an adult small fits a 34-37 inch chest.
Method: compiled 2026-10-01 from 12 sources, each named beside its row: Bella+Canvas men's/unisex chart (https://www.bellacanvas.com/fit-size-charts, fetched live 2026-10-01); Port Authority K500 polo spec sheet (https://www.sanmar.com/p/1225_Red/specSheetMeasurements, fetched live 2026-10-01); Gildan 5000 spec sheet (https://www.sanmar.com/p/625_Black/specSheetMeasurements, fetched live 2026-10-01); Gildan 8800 polo spec sheet (https://www.sanmar.com/p/574_Purple/specSheetMeasurements, fetched live 2026-10-01); Port & Company PC54 spec sheet (https://www.sanmar.com/p/3985_AquaticBl/specSheetMeasurements, fetched live 2026-10-01); Port & Company PC61 spec sheet (https://www.sanmar.com/p/1634_Ash/specSheetMeasurements, fetched live 2026-10-01); Port Authority K500 spec sheet (https://www.sanmar.com/p/1225_StrongBlue/specSheetMeasurements, fetched live 2026-10-01); Port & Company LPC54 spec sheet (https://www.sanmar.com/p/6464_AthlMaroon/specSheetMeasurements, fetched live 2026-10-01); Port & Company LPC54 women's spec sheet (https://www.sanmar.com/p/6464_JetBlack/specSheetMeasurements, fetched live 2026-10-01); Gildan 5000L women's spec sheet (https://www.sanmar.com/p/6478_Navy/specSheetMeasurements, fetched live 2026-10-01); Gildan 5000B youth spec sheet (https://www.sanmar.com/p/439_Daisy/specSheetMeasurements, fetched live 2026-10-01); Port & Company PC54Y spec sheet (https://www.sanmar.com/p/3986_Purple/specSheetMeasurements, fetched live 2026-10-01). Where a source gives inches only, cm is converted at 2.54 cm per inch and rounded to the nearest cm. Values a source publishes outside a plausible garment range are left out.
What chest does an XS fit compared with a small?
Body chest, measured around the fullest part of the chest.
| Size | Brand and style | Measurement | Inches | cm | Source |
|---|---|---|---|---|---|
| Adult XS | Bella+Canvas men's/unisex | Body chest it fits | 31-34 | 79-86 (converted) | bellacanvas.com/fit-size-charts, "Men's/Unisex Chest" row, fetched 2026-10-01 |
| Adult XS | Port Authority K500 polo | Body chest it fits | 32-34 | 81-86 (converted) | www.sanmar.com/p/1225_Red/specSheetMeasurements, Size Chart 'Chest' row, fetched 2026-10-01 |
| Adult S | Bella+Canvas men's/unisex | Body chest it fits | 34-37 | 86-94 (converted) | bellacanvas.com/fit-size-charts, "Men's/Unisex Chest" row, fetched 2026-10-01 |
| Adult S | Gildan 5000 | Body chest it fits | 36-37 | 91-94 (converted) | www.sanmar.com/p/625_Black/specSheetMeasurements, Size Chart 'Chest' row, fetched 2026-10-01 |
| Adult S | Gildan 8800 polo | Body chest it fits | 36-37 | 91-94 (converted) | www.sanmar.com/p/574_Purple/specSheetMeasurements, Size Chart 'Chest' row, fetched 2026-10-01 |
| Adult S | Port & Company PC54 | Body chest it fits | 35-37 | 89-94 (converted) | www.sanmar.com/p/3985_AquaticBl/specSheetMeasurements, Size Chart 'Chest' row, fetched 2026-10-01 |
| Adult S | Port & Company PC61 | Body chest it fits | 35-37 | 89-94 (converted) | www.sanmar.com/p/1634_Ash/specSheetMeasurements, Size Chart 'Chest' row, fetched 2026-10-01 |
How big are XS and small shirts themselves?
Garment measurements from the spec sheets: chest laid flat and body length.
| Size | Brand and style | Measurement | Inches | cm | Source |
|---|---|---|---|---|---|
| Adult XS | Port Authority K500 | Chest, laid flat | 19.5 | 50 (converted) | www.sanmar.com/p/1225_StrongBlue/specSheetMeasurements, Product Measurements 'Chest' row, fetched 2026-10-01 |
| Adult XS | Port Authority K500 polo | Chest, laid flat | 19.5 | 50 (converted) | www.sanmar.com/p/1225_Red/specSheetMeasurements, Product Measurements 'Chest' row, fetched 2026-10-01 |
| Adult XS | Port Authority K500 | Body length | 28 | 71 (converted) | www.sanmar.com/p/1225_StrongBlue/specSheetMeasurements, Product Measurements 'Body Length at Back' row, fetched 2026-10-01 |
| Adult XS | Port Authority K500 polo | Body length | 28 | 71 (converted) | www.sanmar.com/p/1225_Red/specSheetMeasurements, Product Measurements 'Body Length at Back' row, fetched 2026-10-01 |
| Adult S | Gildan 5000 | Chest, laid flat | 18 | 46 (converted) | www.sanmar.com/p/625_Black/specSheetMeasurements, Product Measurements 'Chest' row, fetched 2026-10-01 |
| Adult S | Gildan 8800 polo | Chest, laid flat | 18 | 46 (converted) | www.sanmar.com/p/574_Purple/specSheetMeasurements, Product Measurements 'Chest' row, fetched 2026-10-01 |
| Adult S | Port & Company PC54 | Chest, laid flat | 18 | 46 (converted) | www.sanmar.com/p/3985_AquaticBl/specSheetMeasurements, Product Measurements 'Chest' row, fetched 2026-10-01 |
| Adult S | Port & Company PC54 | Chest, laid flat | 18 | 46 (converted) | www.sanmar.com/p/3985_AquaticBl/specSheetMeasurements, Product Measurements 'Chest' row, fetched 2026-10-01 |
| Adult S | Gildan 5000 | Body length | 28 | 71 (converted) | www.sanmar.com/p/625_Black/specSheetMeasurements, Product Measurements 'Body Length at Back' row, fetched 2026-10-01 |
| Adult S | Gildan 8800 polo | Body length | 27.5 | 70 (converted) | www.sanmar.com/p/574_Purple/specSheetMeasurements, Product Measurements 'Body Length at Back' row, fetched 2026-10-01 |
| Adult S | Port & Company PC54 | Body length | 28 | 71 (converted) | www.sanmar.com/p/3985_AquaticBl/specSheetMeasurements, Product Measurements 'Body Length at Back' row, fetched 2026-10-01 |
| Adult S | Port & Company PC54 | Body length | 28 | 71 (converted) | www.sanmar.com/p/3985_AquaticBl/specSheetMeasurements, Product Measurements 'Body Length at Back' row, fetched 2026-10-01 |
Is a women's size 2 an XS or a small?
The number sizes each brand prints under women's XS and small.
| Size | Brand and style | Numeric size | Source |
|---|---|---|---|
| Women's XS | Bella+Canvas women's Flowy | 0-2 | bellacanvas.com/fit-size-charts, "Flowy" row, fetched 2026-10-01 |
| Women's XS | Bella+Canvas women's Jersey & Rib | 0-2 | bellacanvas.com/fit-size-charts, "Jersey & Rib" row, fetched 2026-10-01 |
| Women's XS | Port & Company LPC54 | 2 | www.sanmar.com/p/6464_AthlMaroon/specSheetMeasurements, 'Size' row, fetched 2026-10-01 |
| Women's XS | Port & Company LPC54 women's | 2 | www.sanmar.com/p/6464_JetBlack/specSheetMeasurements, 'Size' row, fetched 2026-10-01 |
| Women's S | Bella+Canvas women's Flowy | 2-4 | bellacanvas.com/fit-size-charts, "Flowy" row, fetched 2026-10-01 |
| Women's S | Bella+Canvas women's Jersey & Rib | 2-4 | bellacanvas.com/fit-size-charts, "Jersey & Rib" row, fetched 2026-10-01 |
| Women's S | Bella+Canvas women's Relaxed | 2-6 | bellacanvas.com/fit-size-charts, "Relaxed" row, fetched 2026-10-01 |
| Women's S | Port & Company LPC54 | 4/6 | www.sanmar.com/p/6464_AthlMaroon/specSheetMeasurements, 'Size' row, fetched 2026-10-01 |
| Women's S | Port & Company LPC54 women's | 4/6 | www.sanmar.com/p/6464_JetBlack/specSheetMeasurements, 'Size' row, fetched 2026-10-01 |
What bust do women's XS and small fit?
Body bust on women's cut tees.
| Size | Brand and style | Measurement | Inches | cm | Source |
|---|---|---|---|---|---|
| Women's XS | Port & Company LPC54 | Body bust it fits | 32-34 | 81-86 (converted) | www.sanmar.com/p/6464_AthlMaroon/specSheetMeasurements, Size Chart 'Bust' row, fetched 2026-10-01 |
| Women's XS | Port & Company LPC54 women's | Body bust it fits | 32-34 | 81-86 (converted) | www.sanmar.com/p/6464_JetBlack/specSheetMeasurements, Size Chart 'Bust' row, fetched 2026-10-01 |
| Women's S | Gildan 5000L women's | Body bust it fits | 34-35.25 | 86-90 (converted) | www.sanmar.com/p/6478_Navy/specSheetMeasurements, Size Chart 'Bust' row, fetched 2026-10-01 |
| Women's S | Port & Company LPC54 | Body bust it fits | 35-36 | 89-91 (converted) | www.sanmar.com/p/6464_AthlMaroon/specSheetMeasurements, Size Chart 'Bust' row, fetched 2026-10-01 |
| Women's S | Port & Company LPC54 women's | Body bust it fits | 35-36 | 89-91 (converted) | www.sanmar.com/p/6464_JetBlack/specSheetMeasurements, Size Chart 'Bust' row, fetched 2026-10-01 |
Is a youth XL the same as an adult XS?
The largest youth size beside the smallest adult size, laid flat.
| Size | Brand and style | Measurement | Inches | cm | Source |
|---|---|---|---|---|---|
| Youth XL | Gildan 5000B youth | Chest, laid flat | 20 | 51 (converted) | www.sanmar.com/p/439_Daisy/specSheetMeasurements, Product Measurements 'Chest' row, fetched 2026-10-01 |
| Youth XL | Port & Company PC54Y | Chest, laid flat | 19 | 48 (converted) | www.sanmar.com/p/3986_Purple/specSheetMeasurements, Product Measurements 'Chest' row, fetched 2026-10-01 |
| Youth XL | Port & Company PC54Y youth | Chest, laid flat | 19 | 48 (converted) | www.sanmar.com/p/3986_Purple/specSheetMeasurements, Product Measurements 'Chest' row, fetched 2026-10-01 |