XXXXL Size: Everything You Need to Know
XXXXL is the same label as 4XL, but what it fits depends on the brand: Nike's men's 4XL fits a 58–63 inch chest, while Calvin Klein's plus size women's 4XL is a US 16–18.
Where is this 4XL from?
58–63 in chest147–160 cm chest
Nike men's 4XL, body measurement
Is it a size 18? Nike's men's tops chart has no numeric size for this.
Source: Nike men’s chart, checked November 2026.
Enter your measurement
Body measurements from official charts, checked November 2026: Nike, adidas, Strongsize. Your numbers stay in your browser.
Convert a size label
- Letter
- 4XL
- US
- 52
- UK
- 52
- EU
- 62
No verified match for that label. Try a letter like 4XL or a number from the brand’s chart.
Based on: Calvin Klein, tops and shirts, plus size line. Source, checked 2026-11-08.
Conversions follow one brand’s published guide, so another brand may differ. JP, CN and IN are not shown because we have no verified source yet.
XXXXL size chart by brand
This 2026 size chart lists body measurements from each brand's own chart. Men's and women's lines are kept apart because their labels don't line up.
| Label | Nike | adidas | Strongsize |
|---|---|---|---|
| XL | 44–48.5112–123 | 43–46.5109–118 | 45–48114–122 |
| XXL | 48.5–53.5123–136 | 47–51119–130 | 49–52124–132 |
| 3XL | 53.5–58136–147 | 51.5–56131–142 | 53–56135–142 |
| 4XL | 58–63147–160 | — | 57–60145–152 |
| 5XL | — | — | 61–64155–163 |
| 6XL | — | — | 65–68165–173 |
Official charts, checked November 2026: Nike, adidas, Strongsize. A dash means that brand's chart does not list the label.
| Label | Nike | adidas |
|---|---|---|
| 1X | 47–49.5119–126 | 41–44.5104–113 |
| 2X | 49.5–52126–132 | 45–48.5114–123 |
| 3X | 52–55132–140 | 49–52.5124–133 |
| 4X | 55–58140–147 | 53–56.5135–144 |
Official charts, checked November 2026: Nike, adidas. A dash means that brand's chart does not list the label.
US, UK and EU size comparison
Each row follows one brand's guide, so another brand may differ. JP, CN and IN are not shown because we have no verified source yet.
| Label | US | UK | EU | From |
|---|---|---|---|---|
| XL | 42 | 42 | 52 | Calvin Klein |
| XXL | 48 | 48 | 58 | Calvin Klein |
| 3XL | 50 | 50 | 60 | Calvin Klein |
| 4XL | 52 | 52 | 62 | Calvin Klein |
| 5XL | 54 | 54 | 64 | Calvin Klein |
| 6XL | 56 | 56 | 66 | Calvin Klein |
Published guides, checked November 2026: Calvin Klein.
| Label | US | UK | EU | From |
|---|---|---|---|---|
| XL | 10 | 14 | 42 | Tommy Hilfiger |
| XXL | 12–14 | 16–18 | 44–46 | Calvin Klein |
| 3XL | 14–16 | 18–20 | 46–48 | Calvin Klein |
| 4XL | 16–18 | 20–22 | 48–50 | Calvin Klein |
| 5XL | 18–20 | 22–24 | 50–52 | Calvin Klein |
| 6XL | 20 | 24 | 52 | Tommy Hilfiger |
Published guides, checked November 2026: Tommy Hilfiger, Calvin Klein.
How to measure
- Use a soft tape. Wear a thin layer and use a soft measuring tape.
- Measure your chest or bust. Wrap the tape around the fullest part, keeping it level.
- Measure your waist and hips. Keep the tape level and snug, without pulling it tight.
- Compare with the brand chart. Match your numbers to the chart for the brand you are buying.
Questions
Is XXXXL the same as 4XL?
Yes. XXXXL and 4XL are two ways of writing the same label. What that label fits still depends on the brand.
What size is 4XL in numbers?
There is no single number. Calvin Klein's plus size 4XL tops and dresses are listed as US 16–18, while Nike lists its women's 4X as US 30W–32W. Check which line your label belongs to.
Is 4XL the same as 4X?
Not always. 4X is usually a women's plus line label, and 4XL can be a men's or women's label. They can cover very different measurements, so compare the chart for the item you are buying.
What chest size is a men's 4XL?
Nike's men's 4XL fits a 58–63 inch chest. Sizes vary by brand, and adidas's regular men's chart stops at 3XL.
What if I am between two sizes?
Nike advises ordering the smaller size for a tighter fit or the larger size for a looser fit. If your chest and waist point to different sizes, Nike says to go by your chest.