How to determine athletic wear size
online — without trying on. Free.

Why athletic wear returns are higher than fashion returns

The four-way stretch in performance fabrics means the SAME size from the same brand can fit differently on bodies with the same chart measurements — because the fabric tension distributes around your specific proportions (calves, thighs, hip shelf, lat width). Size charts give you a starting band; they don't tell you whether the high-rise leggings hit at the right rib position, whether the sports bra band cuts in over your ribs, or whether the running short rides up on your specific thigh shape. A virtual render is the only way to see the actual proportion before the order ships — and combined with the brand's chart it cuts your return rate sharply.

The athletic sizing checklist that actually works online

• Step 1: Measure your real body — chest, underbust, natural waist, hip, inseam. Once.
• Step 2: Cross-check the BRAND's official chart for the specific item (not a generic brand chart — Lululemon Align ≠ Lululemon Wunder Train sizing).
• Step 3: RENDER the item on your photo. The render shows fabric stretch + cut against your real body — the chart only gives the underlying body measurement.
• Step 4: If the render shows the item pulling or sagging, try the next size up/down and re-render.
• Step 5: Buy ONLY the size that survived the render. Most users save 1-2 returns per athletic order this way.