A medium polo fits a 38-40 inch chest (97-102 cm) in Gildan 8800 polo and a 38-40 inch chest in Port Authority K500 polo, and measures 20 and 21.5 inches across the chest laid flat.
Method: compiled 2026-09-29 from 3 sources, each named beside its row: Gildan 8800 polo spec sheet (https://www.sanmar.com/p/574_Purple/specSheetMeasurements, fetched live 2026-09-29); Port Authority K500 polo spec sheet (https://www.sanmar.com/p/1225_Red/specSheetMeasurements, fetched live 2026-09-29); Gildan 8800B youth polo spec sheet (https://www.sanmar.com/p/5323_Royal/specSheetMeasurements, fetched live 2026-09-29). 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 each polo size fit?
Body chest, measured around the wearer.
| Size | Brand and style | Measurement | Inches | cm | Source |
|---|---|---|---|---|---|
| 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 2026-09-29 |
| 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 2026-09-29 |
| Adult S | Port Authority K500 polo | Body chest it fits | 35-37 | 89-94 (converted) | www.sanmar.com/p/1225_Red/specSheetMeasurements, Size Chart 'Chest' row, fetched 2026-09-29 |
| Adult M | Gildan 8800 polo | Body chest it fits | 38-40 | 97-102 (converted) | www.sanmar.com/p/574_Purple/specSheetMeasurements, Size Chart 'Chest' row, fetched 2026-09-29 |
| Adult M | Port Authority K500 polo | Body chest it fits | 38-40 | 97-102 (converted) | www.sanmar.com/p/1225_Red/specSheetMeasurements, Size Chart 'Chest' row, fetched 2026-09-29 |
| Adult L | Gildan 8800 polo | Body chest it fits | 42-44 | 107-112 (converted) | www.sanmar.com/p/574_Purple/specSheetMeasurements, Size Chart 'Chest' row, fetched 2026-09-29 |
| Adult L | Port Authority K500 polo | Body chest it fits | 41-43 | 104-109 (converted) | www.sanmar.com/p/1225_Red/specSheetMeasurements, Size Chart 'Chest' row, fetched 2026-09-29 |
| Adult XL | Gildan 8800 polo | Body chest it fits | 46-48 | 117-122 (converted) | www.sanmar.com/p/574_Purple/specSheetMeasurements, Size Chart 'Chest' row, fetched 2026-09-29 |
| Adult XL | Port Authority K500 polo | Body chest it fits | 44-46 | 112-117 (converted) | www.sanmar.com/p/1225_Red/specSheetMeasurements, Size Chart 'Chest' row, fetched 2026-09-29 |
| Adult 2XL | Gildan 8800 polo | Body chest it fits | 50-52 | 127-132 (converted) | www.sanmar.com/p/574_Purple/specSheetMeasurements, Size Chart 'Chest' row, fetched 2026-09-29 |
| Adult 2XL | Port Authority K500 polo | Body chest it fits | 47-49 | 119-124 (converted) | www.sanmar.com/p/1225_Red/specSheetMeasurements, Size Chart 'Chest' row, fetched 2026-09-29 |
| Adult 3XL | Gildan 8800 polo | Body chest it fits | 54-56 | 137-142 (converted) | www.sanmar.com/p/574_Purple/specSheetMeasurements, Size Chart 'Chest' row, fetched 2026-09-29 |
| Adult 3XL | Port Authority K500 polo | Body chest it fits | 50-53 | 127-135 (converted) | www.sanmar.com/p/1225_Red/specSheetMeasurements, Size Chart 'Chest' row, fetched 2026-09-29 |
How wide and long is each polo?
Garment measurements from the spec sheets: chest laid flat and body length at the back.
| Size | Brand and style | Measurement | Inches | cm | Source |
|---|---|---|---|---|---|
| Adult S | Gildan 8800 polo | Chest, laid flat | 18 | 46 (converted) | www.sanmar.com/p/574_Purple/specSheetMeasurements, Product Measurements 'Chest' row, fetched 2026-09-29 |
| Adult S | Port Authority K500 polo | Chest, laid flat | 20.5 | 52 (converted) | www.sanmar.com/p/1225_Red/specSheetMeasurements, Product Measurements 'Chest' row, fetched 2026-09-29 |
| 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 2026-09-29 |
| Adult S | Port Authority K500 polo | Body length | 29 | 74 (converted) | www.sanmar.com/p/1225_Red/specSheetMeasurements, Product Measurements 'Body Length at Back' row, fetched 2026-09-29 |
| Adult M | Gildan 8800 polo | Chest, laid flat | 20 | 51 (converted) | www.sanmar.com/p/574_Purple/specSheetMeasurements, Product Measurements 'Chest' row, fetched 2026-09-29 |
| Adult M | Port Authority K500 polo | Chest, laid flat | 21.5 | 55 (converted) | www.sanmar.com/p/1225_Red/specSheetMeasurements, Product Measurements 'Chest' row, fetched 2026-09-29 |
| Adult M | Gildan 8800 polo | Body length | 29 | 74 (converted) | www.sanmar.com/p/574_Purple/specSheetMeasurements, Product Measurements 'Body Length at Back' row, fetched 2026-09-29 |
| Adult M | Port Authority K500 polo | Body length | 30 | 76 (converted) | www.sanmar.com/p/1225_Red/specSheetMeasurements, Product Measurements 'Body Length at Back' row, fetched 2026-09-29 |
| Adult L | Gildan 8800 polo | Chest, laid flat | 22 | 56 (converted) | www.sanmar.com/p/574_Purple/specSheetMeasurements, Product Measurements 'Chest' row, fetched 2026-09-29 |
| Adult L | Port Authority K500 polo | Chest, laid flat | 23.5 | 60 (converted) | www.sanmar.com/p/1225_Red/specSheetMeasurements, Product Measurements 'Chest' row, fetched 2026-09-29 |
| Adult L | Gildan 8800 polo | Body length | 30 | 76 (converted) | www.sanmar.com/p/574_Purple/specSheetMeasurements, Product Measurements 'Body Length at Back' row, fetched 2026-09-29 |
| Adult L | Port Authority K500 polo | Body length | 31 | 79 (converted) | www.sanmar.com/p/1225_Red/specSheetMeasurements, Product Measurements 'Body Length at Back' row, fetched 2026-09-29 |
| Adult XL | Gildan 8800 polo | Chest, laid flat | 24 | 61 (converted) | www.sanmar.com/p/574_Purple/specSheetMeasurements, Product Measurements 'Chest' row, fetched 2026-09-29 |
| Adult XL | Port Authority K500 polo | Chest, laid flat | 25.5 | 65 (converted) | www.sanmar.com/p/1225_Red/specSheetMeasurements, Product Measurements 'Chest' row, fetched 2026-09-29 |
| Adult XL | Gildan 8800 polo | Body length | 31 | 79 (converted) | www.sanmar.com/p/574_Purple/specSheetMeasurements, Product Measurements 'Body Length at Back' row, fetched 2026-09-29 |
| Adult XL | Port Authority K500 polo | Body length | 32 | 81 (converted) | www.sanmar.com/p/1225_Red/specSheetMeasurements, Product Measurements 'Body Length at Back' row, fetched 2026-09-29 |
| Adult 2XL | Gildan 8800 polo | Chest, laid flat | 26 | 66 (converted) | www.sanmar.com/p/574_Purple/specSheetMeasurements, Product Measurements 'Chest' row, fetched 2026-09-29 |
| Adult 2XL | Port Authority K500 polo | Chest, laid flat | 27.5 | 70 (converted) | www.sanmar.com/p/1225_Red/specSheetMeasurements, Product Measurements 'Chest' row, fetched 2026-09-29 |
| Adult 2XL | Gildan 8800 polo | Body length | 32 | 81 (converted) | www.sanmar.com/p/574_Purple/specSheetMeasurements, Product Measurements 'Body Length at Back' row, fetched 2026-09-29 |
| Adult 2XL | Port Authority K500 polo | Body length | 33 | 84 (converted) | www.sanmar.com/p/1225_Red/specSheetMeasurements, Product Measurements 'Body Length at Back' row, fetched 2026-09-29 |
| Adult 3XL | Gildan 8800 polo | Chest, laid flat | 28 | 71 (converted) | www.sanmar.com/p/574_Purple/specSheetMeasurements, Product Measurements 'Chest' row, fetched 2026-09-29 |
| Adult 3XL | Port Authority K500 polo | Chest, laid flat | 28.5 | 72 (converted) | www.sanmar.com/p/1225_Red/specSheetMeasurements, Product Measurements 'Chest' row, fetched 2026-09-29 |
| Adult 3XL | Gildan 8800 polo | Body length | 33 | 84 (converted) | www.sanmar.com/p/574_Purple/specSheetMeasurements, Product Measurements 'Body Length at Back' row, fetched 2026-09-29 |
| Adult 3XL | Port Authority K500 polo | Body length | 33.5 | 85 (converted) | www.sanmar.com/p/1225_Red/specSheetMeasurements, Product Measurements 'Body Length at Back' row, fetched 2026-09-29 |
Which polos come in big sizes?
Sizes above 3XL, where the spec sheets list them.
| Size | Brand and style | Measurement | Inches | cm | Source |
|---|---|---|---|---|---|
| Adult 4XL | Gildan 8800 polo | Body chest it fits | 58-60 | 147-152 (converted) | www.sanmar.com/p/574_Purple/specSheetMeasurements, Size Chart 'Chest' row, fetched 2026-09-29 |
| Adult 4XL | Port Authority K500 polo | Body chest it fits | 54-57 | 137-145 (converted) | www.sanmar.com/p/1225_Red/specSheetMeasurements, Size Chart 'Chest' row, fetched 2026-09-29 |
| Adult 5XL | Gildan 8800 polo | Body chest it fits | 62-64 | 157-163 (converted) | www.sanmar.com/p/574_Purple/specSheetMeasurements, Size Chart 'Chest' row, fetched 2026-09-29 |
| Adult 5XL | Port Authority K500 polo | Body chest it fits | 58-60 | 147-152 (converted) | www.sanmar.com/p/1225_Red/specSheetMeasurements, Size Chart 'Chest' row, fetched 2026-09-29 |
| Adult 6XL | Port Authority K500 polo | Body chest it fits | 61-63 | 155-160 (converted) | www.sanmar.com/p/1225_Red/specSheetMeasurements, Size Chart 'Chest' row, fetched 2026-09-29 |
| Adult 7XL | Port Authority K500 polo | Body chest it fits | 64-66 | 163-168 (converted) | www.sanmar.com/p/1225_Red/specSheetMeasurements, Size Chart 'Chest' row, fetched 2026-09-29 |
| Adult 8XL | Port Authority K500 polo | Body chest it fits | 67-69 | 170-175 (converted) | www.sanmar.com/p/1225_Red/specSheetMeasurements, Size Chart 'Chest' row, fetched 2026-09-29 |
| Adult 9XL | Port Authority K500 polo | Body chest it fits | 70-72 | 178-183 (converted) | www.sanmar.com/p/1225_Red/specSheetMeasurements, Size Chart 'Chest' row, fetched 2026-09-29 |
| Adult 10XL | Port Authority K500 polo | Body chest it fits | 73-75 | 185-191 (converted) | www.sanmar.com/p/1225_Red/specSheetMeasurements, Size Chart 'Chest' row, fetched 2026-09-29 |
Is a youth polo sized like a youth tee?
The youth version of the Gildan jersey polo, laid flat.
| Size | Brand and style | Measurement | Inches | cm | Source |
|---|---|---|---|---|---|
| Youth S | Gildan 8800B youth polo | Chest, laid flat | 16 | 41 (converted) | www.sanmar.com/p/5323_Royal/specSheetMeasurements, Product Measurements 'Chest' row, fetched 2026-09-29 |
| Youth M | Gildan 8800B youth polo | Chest, laid flat | 17 | 43 (converted) | www.sanmar.com/p/5323_Royal/specSheetMeasurements, Product Measurements 'Chest' row, fetched 2026-09-29 |
| Youth L | Gildan 8800B youth polo | Chest, laid flat | 18 | 46 (converted) | www.sanmar.com/p/5323_Royal/specSheetMeasurements, Product Measurements 'Chest' row, fetched 2026-09-29 |
| Youth XL | Gildan 8800B youth polo | Chest, laid flat | 19 | 48 (converted) | www.sanmar.com/p/5323_Royal/specSheetMeasurements, Product Measurements 'Chest' row, fetched 2026-09-29 |