US size to EU clothes conversion

A size 38 in US clothing terms depends on which garment carries the number. On a women's label, an EU 38 converts to roughly a US 6–8 — a medium at most brands. On a men's shirt, 38 is a collar size: a 38-centimeter neckband, which is the US 15-inch collar, also about a medium. That is the whole difficulty of US size to EU clothes conversion — each system encodes something different, so the right chart depends on the garment and the cut it was drawn for. The usual women's offsets are plain arithmetic: EU ≈ US + 32, UK ≈ US + 4, IT ≈ US + 36.

This page covers clothing — shirts and tops in particular — across the four systems that show up on labels: US, EU in its French and German dialects, UK, and Italian. It does not cover footwear; shoe sizes are a separate system with separate offsets, and nothing below applies to them. Both grids are industry-standard reference tables, labeled as such where they appear, and the last section covers what most conversion pages skip: where the offsets fail and what to do about it. The other sizing languages each get their own chart on the size charts shelf.

The offsets stop feeling arbitrary once you see what each number claims to be. European sizes are body measurements in centimeters, worn openly. A men's EU shirt size is the wearer's neck circumference in centimeters: a 38 collar fits a 38-centimeter neck, and since a US 15 collar is 38.1 cm around, EU 38 and US 15 are the same shirt with the unit changed. Women's EU sizes are bust-derived rather than bust-stated — the German ready-to-wear convention is half the bust in centimeters minus six, so an 88 cm (34.6 in) bust wears a 38. The number still traces to a tape measurement; it is just encoded.

US and UK men's shirts do the same job in inches. A 15.5 collar means a 15.5-inch neck in both countries, which is why transatlantic dress-shirt shopping is the one painless case — the full two-number system is decoded on the men's dress shirt chart. Women's numeric sizes are where the anchor disappears: a US 8 is not eight of anything, just an index into a brand's fit block, and the UK uses the same kind of index shifted four higher, so a US 8 sells as a UK 12. Italy stays metric and bust-derived like the rest of the continent, but its women's scale runs four above the French one: an IT 42 equals a French 38.

One continental wrinkle explains most chart disagreements. There are two "EU" women's scales: the French scale, used in the table below, and the German scale, which runs two lower for the same body — the 88 cm bust that wears a German 38 wears a French 40. So a conversion chart claiming EU 38 = US 8 is German-scaled, one claiming EU 38 = US 6 is French-scaled, and neither is wrong. That dialect gap is why the honest womenswear answer for a 38 is a range, US 6–8, not a single number.

Read across a row: every code names the same notional body. The EU column is the French scale — subtract two for German-scaled brands. The letter column is the usual US letter for that numeric size, and it is the least reliable column here, same as everywhere. The bust, waist and hip measurements behind each row are on the women's clothing chart.

The men's grid is a unit conversion, not a code translation: the EU collar is the neck in centimeters, rounded to a stocked whole number — which is why a 16-inch collar (40.5 cm) sells as a 41. UK collars are the same inches as US; Italian collars are the same centimeters as EU. Sleeve length, the second number on a dress shirt label, is arm length in inches in every system, so it needs no conversion row.

Every offset above is a convention brands are free to ignore, and some do. The two continental scales sit a full slot apart; UK labels sometimes import US-style charts wholesale; and decades of unanchored drift mean each brand's 38 is centered on its own customers rather than on any shared tape reading — the mechanism, with measured examples, is at vanity sizing. A conversion chart inherits all of those wobbles and then adds its own rounding on top.

Letters travel worst of all. ShirtMath's published t-shirt specifications put a number on how loose a letter already is before it crosses any border: the ladies' Gildan G500L medium publishes a 17.5-inch flat chest while the unisex mediums in the same catalog publish 20.0–20.5 inches — a 3-inch spread inside one letter, in one country (3.5 inches at L: 19.0 against 22.0–22.5). Chest here is pit-to-pit on a garment laid flat, the pit-to-pit measurement. A letter that cannot survive a change of cut will not survive a change of continent; the full size-by-size spread is on the t-shirt size chart.

The reliable route around all of it is measurement. Centimeters convert to inches by arithmetic, not convention — 2.54 cm to the inch, everywhere — so a garment's flat chest, length and shoulder mean the same thing in Milan and Milwaukee, which no size code manages. Measure a shirt that already fits (how to measure a shirt walks the eight points for tops), compare those numbers against what a retailer publishes, and the international question dissolves: you stop translating between dialects and start comparing numbers. What each label format was trying to tell you in the first place — a lone letter, a bare 40, a 16 34/35 — is decoded at what your shirt size means.