US Size to Italian Size Conversion Table
| US Size (US) | Italian Size (IT) | Reference Benchmark | Formula Step |
|---|---|---|---|
| 0 US | 40 IT | Petite Milanese silk crepe slip cocktail dress | IT = 0 + 40 = 40 |
| 2 US | 42 IT | Structured Italian virgin wool peak-lapel blazer | IT = 2 + 40 = 42 |
| 4 US | 44 IT | Florentine tailored cotton poplin shirt dress | IT = 4 + 40 = 44 |
| 6 US | 46 IT | High-fashion Roman pleated silk midi skirt | IT = 6 + 40 = 46 |
| 8 US | 48 IT | Tailored Italian lightweight wool cigarette trousers | IT = 8 + 40 = 48 |
| 10 US | 50 IT | Double-faced cashmere long belted winter overcoat | IT = 10 + 40 = 50 |
| 12 US | 52 IT | Milan runway structured corporate pant suit | IT = 12 + 40 = 52 |
| 14 US | 54 IT | Floor-length silk chiffon formal gala gown | IT = 14 + 40 = 54 |
| 16 US | 56 IT | Italian designer bohemian floral wrap dress | IT = 16 + 40 = 56 |
| 18 US | 58 IT | Plus-fit Italian stretch denim designer jeans | IT = 18 + 40 = 58 |
| 20 US | 60 IT | Luxury down-filled water-resistant city parka | IT = 20 + 40 = 60 |
| 22 US | 62 IT | Elegantly draped satin evening caftan dress | IT = 22 + 40 = 62 |
| 24 US | 64 IT | Quilted wool-lined luxury winter coat | IT = 24 + 40 = 64 |
| 26 US | 66 IT | Bespoke Milanese evening tuxedo ensemble | IT = 26 + 40 = 66 |
| 28 US | 68 IT | Hand-beaded Italian haute couture ballgown | IT = 28 + 40 = 68 |
| 30 US | 70 IT | Atelier ceremonial embroidered silk robe | IT = 30 + 40 = 70 |
US Size to Italian Size Formula & Unit Definitions
Because both the American and Italian fashion systems increment by consistent 2-inch or 4 cm body circumference grading intervals, the mathematical relationship is an exact integer offset: IT = US + 40.
Quick Estimation: Simply add 40 to your US dress size to find your Italian size. For example, a US 2 is an IT 42, a US 4 is an IT 44, and a US 6 is an IT 46.
US Size (US)
Source Standard- Calibrated under ASTM D5585 specifications for female apparel sizing.
- Numbered on an even scale starting from size 0 through sizes 14, 16, and plus sizes.
- Incorporate standard North American ease allowances across the bust, waist, and hips.
Italian Size (IT)
Target Standard- Standardized across Italian luxury fashion ateliers and ready-to-wear manufacturers.
- Numbered on an even scale starting from IT 38/40 through IT 52 and extended sizes.
- Tailored with distinctly narrow shoulders, high armholes, and closely sculpted waistlines.
Frequently Asked Questions
Q.How do you convert US dress size to Italian IT size?
Add 40 to your US dress size. For example, a US 4 is an IT 44, and a US 6 is an IT 46. To convert in the opposite direction, consult our IT to US clothing converter.
Q.What is the formula for converting US to Italian clothing sizes?
The official formula is IT = US + 40. Both systems follow standard even-number intervals, creating a uniform 40-unit linear translation.
Q.What is a US size 6 in Italian clothing?
A US size 6 corresponds to an Italian size 46 (6 + 40 = 46). In luxury Italian fashion, this corresponds to a medium.
Q.Do Italian clothing sizes run small compared to US sizes?
Yes. Italian designer garments are notoriously tailored with higher armholes, narrower shoulders, and smaller bust and hip ease allowances than American garments.