The W x L sizing format (Waist by Length), such as 38 x 30, is a direct measurement system using inches to define a garment’s dimensions. While standard for men’s jeans, this system appears on women’s denim, particularly in “boyfriend” or imported styles, causing confusion for many shoppers. Understanding what each number represents and how it converts to women’s numerical sizing is essential due to the fashion industry’s inconsistent sizing practices.
Understanding the W x L Format
The W x L format is a straightforward, inch-based measurement system providing two specific dimensions. In the case of 38 x 30, the first number (38) represents the waist circumference in inches, measured around the waistband.
The second number (30) represents the inseam, which is the length from the crotch seam down to the bottom hem of the pant leg. This direct measurement approach is less common in the general women’s apparel market, which often relies on a single numerical size that incorporates multiple body measurements.
The 30-inch length is considered a standard or regular inseam, typically working well for individuals of average height. Converting the 38-inch waist to a women’s numerical size requires a specific calculation to bridge the gap between the two systems.
Converting 38-Inch Waist to Women’s Sizes
To translate a 38-inch waist measurement into a US women’s numerical size, subtract a value ranging from 20 to 22 from the inch size. This conversion accounts for the historical difference between men’s and women’s sizing standards. Applying this rule suggests the corresponding numerical size will fall between a US size 16 and a US size 18.
Specifically, subtracting 20 from 38 yields a size 18, while subtracting 22 yields a size 16. A 38-inch waist most reliably corresponds to a US numerical size 18, though a size 16 or a size 20 may also fit depending on the brand’s specific cut. In letter sizing, this typically aligns with Extra Large (XL) or Double Extra Large (XXL).
The 30-inch inseam is a separate measurement that determines the fit at the ankle. This length is generally considered a regular length, suitable for a person around 5’5″ to 5’7″ tall. Shoppers should always consult the brand’s specific size chart, making size 18 a strong starting point for trying on the garment.
Factors Affecting the Final Fit
The calculated conversion from a 38-inch waist to a US size 18 is only an approximation because of vanity sizing. This occurs when manufacturers intentionally label garments with a smaller size than their actual physical measurements. This means a pair of jeans labeled as a size 18 may actually measure closer to 39 or 40 inches in the waist circumference.
The rise of the jean is another factor that influences where the 38-inch measurement sits on the body. A low-rise jean measures 38 inches around the hips, while a high-rise jean measures 38 inches at the natural waist. Shoppers must consider the rise (low, mid, or high) to ensure the waistband aligns with the intended part of their body.
Fabric composition also affects the final fit, particularly the presence of stretch materials like elastane or spandex. Jeans with a high percentage of stretch allow some individuals to size down from their calculated size 18. Conversely, 100% cotton denim has minimal give and may require sizing up for comfort.