Is XL the same as plus-size?

No. XL is the top of standard sizing (US 14-16). 1X is the bottom of plus-size (US 14W-16W). Same body range, different cuts. XL uses scaled-up standard proportions; 1X uses plus-size cut from the start.

What's 1X, 2X, 3X, 4X?

1X = 14W-16W. 2X = 18W-20W. 3X = 22W-24W. 4X = 26W-28W. Plus-size letter sizing covers approximately 2 numbered sizes per letter.

Where does plus-size end?

Most major brands cap at 4X (26W-28W) or 5X (30W-32W). Specialty extended-size brands go to 7X+. Universal Standard offers up to 40 (8X). Older Navy goes to 30.

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Sizing decoded May 31, 2026 3 min read

What Does Plus Size Start At?

Q: What does plus size start at?

US plus-size starts at size 14W (or 1X). UK plus-size starts at 18. EU plus-size starts at 46. The 'W' suffix indicates plus-cut: 14W has plus-size proportions (fuller hip, fuller arm) compared to standard 14.

US: 14W or 1X. UK: 18. EU: 46. Plus-size has its own cut (fuller hip, fuller arm) — not just a scaled-up standard.

Plus Size by Region

Region	Plus starts at	Letter equivalent
US	14W	1X
UK	18	—
EU	46	—
AU	16	—
JP	LL/3L	—

Plus-Size Letter Sizing

Letter	US numerical
1X	14W-16W
2X	18W-20W
3X	22W-24W
4X	26W-28W
5X	30W-32W

FAQs

Plus size starts at?

US 14W or 1X. UK 18. EU 46.

XL = plus?

No — XL is standard top, 1X is plus bottom.

1X-4X?

14W-16W to 26W-28W.

Where does plus end?

Most brands cap at 4X-5X. Universal Standard goes to 8X.

Selling plus-size on Shopify?

Tailor Size Guide adds extended-range matching across X-letter and W-numerical.

Install the Shopify app Read the docs