Men's Apparel Sizing Guide

Confluence Running Sizing Guide

Start with measurements. Then consider the cut.

Men's running apparel varies by brand, fabric and intended fit. A familiar size label is useful, but current measurements and garment-specific fit notes are more reliable.

Best starting point: compare fresh chest, waist, hip and inseam measurements with the current manufacturer chart, then check whether the garment is designed to fit close or relaxed.

How to measure

ChestMeasure around the fullest part of the chest with the tape level across the back.
WaistMeasure around the natural waist without pulling the tape tight.
HipsMeasure around the fullest part of the hips and seat.
InseamMeasure from the crotch seam to the desired hem length along the inside of the leg.

Choose based on the garment

Shirts, jackets and vests: chest measurement is typically the strongest starting point.

Shorts, tights and pants: waist and hip measurements matter more.

Length-sensitive pieces: inseam becomes important when a style offers different lengths or when coverage is a priority.

Regular, fitted and relaxed are not interchangeable

A labeled size does not tell you the intended silhouette. Some running tops are designed to sit close to the body for moisture management, while others are intentionally relaxed. Read the product description and fit notes before sizing up or down based only on how another garment fits.

If you are between sizes

Consider intended use and your fit preference. For a relaxed layer, the larger size may be more comfortable. For a fitted performance garment, follow the brand's measurement chart and intended fit. If measurements span two sizes, prioritize the measurement most important to the garment's function.

Ready to shop?

Use the measurement guide to choose your starting size, then check the individual product for its intended fit.

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