How do I size stretch fabric clothing?

Stretch fabric items are typically cut smaller than non-stretch to account for the fabric's give. Measure garments in their relaxed (unstretched) state. Include stretch percentage in your size chart so customers understand how much give the fabric has.

What is stretch percentage?

Stretch percentage indicates how much a fabric can extend. A fabric with 20% stretch can extend 20% beyond its relaxed measurement. For example, a 10" piece can stretch to 12". Higher percentages mean more stretch and a closer fit to the body.

🧵 Fabric Stretch

Size Charts for Stretch Fabrics

Master sizing for spandex, jersey, and elastic materials. Learn about stretch percentages and how to size activewear, leggings, and stretch garments.

Updated: January 2026

8 min read

Stretch fabric sizing guide showing stretch percentage and measurement techniques

The Key to Stretch Sizing

Stretch garments fit differently than non-stretch. They're cut smaller to hug the body, relying on fabric stretch for fit. Always measure in relaxed state and note stretch percentage.

📐 Understanding Stretch Percentage

How Stretch Works

10"

Relaxed

→

12"

Stretched

20%

Stretch

Formula: (Stretched - Relaxed) ÷ Relaxed × 100 = Stretch %

5-15%

Low Stretch

Denim with spandex, woven blends

20-40%

Medium Stretch

Jersey, cotton blends, T-shirts

50%+

High Stretch

Spandex, lycra, activewear

📏 How to Measure Stretch Garments

Measure Relaxed

Always measure in the garment's natural, unstretched state. Lay flat without pulling.

Note Stretch Percentage

Include fabric composition and stretch % in your chart (e.g., "92% cotton, 8% spandex – 20% stretch").

Include Fit Notes

"Designed for compression fit" or "Will stretch to fit body measurements."

Create Stretch Fabric Size Charts

Generate professional size charts with stretch percentages and fit notes.

Create Free Size Chart