A youth medium quarter zip fits a 28-30 inch chest (71-76 cm) in Port & Company PC78YQ and a 28-30 inch chest in Sport-Tek YST357.
Method: compiled 2026-10-01 from 2 sources, each named beside its row: Port & Company PC78YQ spec sheet (https://www.sanmar.com/p/31873_Red/specSheetMeasurements, fetched live 2026-10-01); Sport-Tek YST357 spec sheet (https://www.sanmar.com/p/9520_GyConcrete/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 each quarter zip size fit?
Body chest, measured around the wearer at the fullest part.
| Size | Brand and style | Measurement | Inches | cm | Source |
|---|---|---|---|---|---|
| Youth XS | Port & Company PC78YQ | Body chest it fits | 22-24 | 56-61 (converted) | www.sanmar.com/p/31873_Red/specSheetMeasurements, Size Chart 'Chest' row, fetched 2026-10-01 |
| Youth XS | Sport-Tek YST357 | Body chest it fits | 22-24 | 56-61 (converted) | www.sanmar.com/p/9520_GyConcrete/specSheetMeasurements, Size Chart 'Chest' row, fetched 2026-10-01 |
| Youth S | Port & Company PC78YQ | Body chest it fits | 25-27 | 64-69 (converted) | www.sanmar.com/p/31873_Red/specSheetMeasurements, Size Chart 'Chest' row, fetched 2026-10-01 |
| Youth S | Sport-Tek YST357 | Body chest it fits | 25-27 | 64-69 (converted) | www.sanmar.com/p/9520_GyConcrete/specSheetMeasurements, Size Chart 'Chest' row, fetched 2026-10-01 |
| Youth M | Port & Company PC78YQ | Body chest it fits | 28-30 | 71-76 (converted) | www.sanmar.com/p/31873_Red/specSheetMeasurements, Size Chart 'Chest' row, fetched 2026-10-01 |
| Youth M | Sport-Tek YST357 | Body chest it fits | 28-30 | 71-76 (converted) | www.sanmar.com/p/9520_GyConcrete/specSheetMeasurements, Size Chart 'Chest' row, fetched 2026-10-01 |
| Youth L | Port & Company PC78YQ | Body chest it fits | 30-32 | 76-81 (converted) | www.sanmar.com/p/31873_Red/specSheetMeasurements, Size Chart 'Chest' row, fetched 2026-10-01 |
| Youth L | Sport-Tek YST357 | Body chest it fits | 30-32 | 76-81 (converted) | www.sanmar.com/p/9520_GyConcrete/specSheetMeasurements, Size Chart 'Chest' row, fetched 2026-10-01 |
| Youth XL | Port & Company PC78YQ | Body chest it fits | 32-34 | 81-86 (converted) | www.sanmar.com/p/31873_Red/specSheetMeasurements, Size Chart 'Chest' row, fetched 2026-10-01 |
| Youth XL | Sport-Tek YST357 | Body chest it fits | 32-34 | 81-86 (converted) | www.sanmar.com/p/9520_GyConcrete/specSheetMeasurements, Size Chart 'Chest' row, fetched 2026-10-01 |
How wide and long is each quarter zip?
Garment measurements from the spec sheets: chest laid flat and body length.
| Size | Brand and style | Measurement | Inches | cm | Source |
|---|---|---|---|---|---|
| Youth XS | Port & Company PC78YQ | Chest, laid flat | 14 | 36 (converted) | www.sanmar.com/p/31873_Red/specSheetMeasurements, Product Measurements 'Chest' row, fetched 2026-10-01 |
| Youth XS | Sport-Tek YST357 | Chest, laid flat | 14.25 | 36 (converted) | www.sanmar.com/p/9520_GyConcrete/specSheetMeasurements, Product Measurements 'Chest' row, fetched 2026-10-01 |
| Youth XS | Port & Company PC78YQ | Body length | 19 | 48 (converted) | www.sanmar.com/p/31873_Red/specSheetMeasurements, Product Measurements 'Body Length at Back' row, fetched 2026-10-01 |
| Youth XS | Sport-Tek YST357 | Body length | 19 | 48 (converted) | www.sanmar.com/p/9520_GyConcrete/specSheetMeasurements, Product Measurements 'Body Length at Back' row, fetched 2026-10-01 |
| Youth S | Port & Company PC78YQ | Chest, laid flat | 15.5 | 39 (converted) | www.sanmar.com/p/31873_Red/specSheetMeasurements, Product Measurements 'Chest' row, fetched 2026-10-01 |
| Youth S | Sport-Tek YST357 | Chest, laid flat | 15.75 | 40 (converted) | www.sanmar.com/p/9520_GyConcrete/specSheetMeasurements, Product Measurements 'Chest' row, fetched 2026-10-01 |
| Youth S | Port & Company PC78YQ | Body length | 21 | 53 (converted) | www.sanmar.com/p/31873_Red/specSheetMeasurements, Product Measurements 'Body Length at Back' row, fetched 2026-10-01 |
| Youth S | Sport-Tek YST357 | Body length | 21 | 53 (converted) | www.sanmar.com/p/9520_GyConcrete/specSheetMeasurements, Product Measurements 'Body Length at Back' row, fetched 2026-10-01 |
| Youth M | Port & Company PC78YQ | Chest, laid flat | 17 | 43 (converted) | www.sanmar.com/p/31873_Red/specSheetMeasurements, Product Measurements 'Chest' row, fetched 2026-10-01 |
| Youth M | Sport-Tek YST357 | Chest, laid flat | 17.25 | 44 (converted) | www.sanmar.com/p/9520_GyConcrete/specSheetMeasurements, Product Measurements 'Chest' row, fetched 2026-10-01 |
| Youth M | Port & Company PC78YQ | Body length | 23 | 58 (converted) | www.sanmar.com/p/31873_Red/specSheetMeasurements, Product Measurements 'Body Length at Back' row, fetched 2026-10-01 |
| Youth M | Sport-Tek YST357 | Body length | 23 | 58 (converted) | www.sanmar.com/p/9520_GyConcrete/specSheetMeasurements, Product Measurements 'Body Length at Back' row, fetched 2026-10-01 |
| Youth L | Port & Company PC78YQ | Chest, laid flat | 18 | 46 (converted) | www.sanmar.com/p/31873_Red/specSheetMeasurements, Product Measurements 'Chest' row, fetched 2026-10-01 |
| Youth L | Sport-Tek YST357 | Chest, laid flat | 18.25 | 46 (converted) | www.sanmar.com/p/9520_GyConcrete/specSheetMeasurements, Product Measurements 'Chest' row, fetched 2026-10-01 |
| Youth L | Port & Company PC78YQ | Body length | 25 | 64 (converted) | www.sanmar.com/p/31873_Red/specSheetMeasurements, Product Measurements 'Body Length at Back' row, fetched 2026-10-01 |
| Youth L | Sport-Tek YST357 | Body length | 25 | 64 (converted) | www.sanmar.com/p/9520_GyConcrete/specSheetMeasurements, Product Measurements 'Body Length at Back' row, fetched 2026-10-01 |
| Youth XL | Port & Company PC78YQ | Chest, laid flat | 19.5 | 50 (converted) | www.sanmar.com/p/31873_Red/specSheetMeasurements, Product Measurements 'Chest' row, fetched 2026-10-01 |
| Youth XL | Sport-Tek YST357 | Chest, laid flat | 19.75 | 50 (converted) | www.sanmar.com/p/9520_GyConcrete/specSheetMeasurements, Product Measurements 'Chest' row, fetched 2026-10-01 |
| Youth XL | Port & Company PC78YQ | Body length | 27 | 69 (converted) | www.sanmar.com/p/31873_Red/specSheetMeasurements, Product Measurements 'Body Length at Back' row, fetched 2026-10-01 |
| Youth XL | Sport-Tek YST357 | Body length | 27 | 69 (converted) | www.sanmar.com/p/9520_GyConcrete/specSheetMeasurements, Product Measurements 'Body Length at Back' row, fetched 2026-10-01 |
How long are the sleeves on each quarter zip?
Sleeve length from the spec sheets; the measurement column says where each brand measures from.
| Size | Brand and style | Measurement | Inches | cm | Source |
|---|---|---|---|---|---|
| Youth XS | Sport-Tek YST357 | Sleeve length | 22 | 56 (converted) | www.sanmar.com/p/9520_GyConcrete/specSheetMeasurements, Product Measurements 'Sleeve Length' row, fetched 2026-10-01 |
| Youth S | Sport-Tek YST357 | Sleeve length | 25 | 64 (converted) | www.sanmar.com/p/9520_GyConcrete/specSheetMeasurements, Product Measurements 'Sleeve Length' row, fetched 2026-10-01 |
| Youth S | Port & Company PC78YQ | Sleeve length from center back | 25.5 | 65 (converted) | www.sanmar.com/p/31873_Red/specSheetMeasurements, Product Measurements 'Sleeve Length from Center Back' row, fetched 2026-10-01 |
| Youth M | Sport-Tek YST357 | Sleeve length | 27.5 | 70 (converted) | www.sanmar.com/p/9520_GyConcrete/specSheetMeasurements, Product Measurements 'Sleeve Length' row, fetched 2026-10-01 |
| Youth M | Port & Company PC78YQ | Sleeve length from center back | 26 | 66 (converted) | www.sanmar.com/p/31873_Red/specSheetMeasurements, Product Measurements 'Sleeve Length from Center Back' row, fetched 2026-10-01 |
| Youth L | Sport-Tek YST357 | Sleeve length | 30 | 76 (converted) | www.sanmar.com/p/9520_GyConcrete/specSheetMeasurements, Product Measurements 'Sleeve Length' row, fetched 2026-10-01 |
| Youth L | Port & Company PC78YQ | Sleeve length from center back | 30.5 | 77 (converted) | www.sanmar.com/p/31873_Red/specSheetMeasurements, Product Measurements 'Sleeve Length from Center Back' row, fetched 2026-10-01 |
| Youth XL | Sport-Tek YST357 | Sleeve length | 33 | 84 (converted) | www.sanmar.com/p/9520_GyConcrete/specSheetMeasurements, Product Measurements 'Sleeve Length' row, fetched 2026-10-01 |
| Youth XL | Port & Company PC78YQ | Sleeve length from center back | 33.5 | 85 (converted) | www.sanmar.com/p/31873_Red/specSheetMeasurements, Product Measurements 'Sleeve Length from Center Back' row, fetched 2026-10-01 |
What number sizes match youth letter sizes?
The number sizes the spec sheets print under each letter.
| Size | Brand and style | Numeric size | Source |
|---|---|---|---|
| Youth XS | Port & Company PC78YQ | 4/5 | www.sanmar.com/p/31873_Red/specSheetMeasurements, 'Size' row, fetched 2026-10-01 |
| Youth XS | Sport-Tek YST357 | 4/5 | www.sanmar.com/p/9520_GyConcrete/specSheetMeasurements, 'Size' row, fetched 2026-10-01 |
| Youth S | Port & Company PC78YQ | 6/8 | www.sanmar.com/p/31873_Red/specSheetMeasurements, 'Size' row, fetched 2026-10-01 |
| Youth S | Sport-Tek YST357 | 6/8 | www.sanmar.com/p/9520_GyConcrete/specSheetMeasurements, 'Size' row, fetched 2026-10-01 |
| Youth M | Port & Company PC78YQ | 10/12 | www.sanmar.com/p/31873_Red/specSheetMeasurements, 'Size' row, fetched 2026-10-01 |
| Youth M | Sport-Tek YST357 | 10/12 | www.sanmar.com/p/9520_GyConcrete/specSheetMeasurements, 'Size' row, fetched 2026-10-01 |
| Youth L | Port & Company PC78YQ | 14/16 | www.sanmar.com/p/31873_Red/specSheetMeasurements, 'Size' row, fetched 2026-10-01 |
| Youth L | Sport-Tek YST357 | 14/16 | www.sanmar.com/p/9520_GyConcrete/specSheetMeasurements, 'Size' row, fetched 2026-10-01 |
| Youth XL | Port & Company PC78YQ | 18/20 | www.sanmar.com/p/31873_Red/specSheetMeasurements, 'Size' row, fetched 2026-10-01 |
| Youth XL | Sport-Tek YST357 | 18/20 | www.sanmar.com/p/9520_GyConcrete/specSheetMeasurements, 'Size' row, fetched 2026-10-01 |