| Category | Inches | 32nds | Decimals | USDA Upland | USDA PIMA | MM |
|---|---|---|---|---|---|---|
| Short Staple | ||||||
| 13/16" | 26 | 0.8125 | 0.80 - 0.85 | 20.64 | ||
| 27/32" | 27 | 0.84375 | 21.43 | |||
| 7/8" | 28 | 0.875 | 0.86 - 0.89 | 22.23 | ||
| 29/32" | 29 | 0.90625 | 0.90 - 0.92 | 23.02 | ||
| 15/16" | 30 | 0.9375 | 0.93 - 0.95 | 23.81 | ||
| 31/32" | 31 | 0.96875 | 0.96 - 0.98 | 24.61 | ||
| 1" | 32 | 1.000 | 0.99 - 1.01 | 25.40 | ||
| Medium Staple | ||||||
| 1.1/32" | 33 | 1.03125 | 1.02 - 1.04 | 26.24 | ||
| 1.1/16" | 34 | 1.0625 | 1.05 - 1.07 | 26.99 | ||
| 1.3/32" | 35 | 1.09375 | 1.08 - 1.10 | 27.78 | ||
| 1.1/8" | 36 | 1.125 | 1.11 - 1.13 | 28.58 | ||
| Medium to Long | ||||||
| 1.5/32" | 37 | 1.15625 | 1.14 - 1.17 | 29.37 | ||
| 1.3/16" | 38 | 1.18754 | 1.18 - 1.20 | 30.16 | ||
| 1.7/32" | 39 | 1.218805 | 1.21 - 1.23 | 30.96 | ||
| Long Staple | ||||||
| 1.1/4" | 40 | 1.25007 | 1.24 - 1.26 | 1.20 | 31.75 | |
| 1.9/32" | 41 | 1.281335 | 1.27 - 1.29 | 32.54 | ||
| 1.5/16" | 42 | 1.3125 | 1.30 - 1.32 | 1.21 - 1.25 | 33.34 | |
| 1.11/32" | 43 | 1.34375 | 1.33 - 1.35 | 34.13 | ||
| 1.3/8" | 44 | 1.375 | 1.36 | 1.26 - 1.31 | 34.93 | |
| 1.13/32" | 45 | 1.40625 | 1.32 - 1.36 | 35.72 | ||
| Extra Long | ||||||
| 1.7/16" | 46 | 1.4375 | 36.51 | |||
| 1.15/32" | 47 | 1.46875 | 37.31 | |||
| 1.1/2" | 48 | 1.5 | 1.37 - 1.42 | 38.10 | ||
| 1.17/32" | 49 | 1.53125 | 38.89 | |||
| 1.9/16" | 50 | 1.5625 | 1.43 - 1.47 | 39.69 | ||
| 1.19/32" | 51 | 1.59375 | 40.48 | |||
| 1.5/8" | 52 | 1.625 | 1.625 | 41.28 | ||
| 1.21/32" | 53 | 1.65625 | 42.07 | |||
| 1.11/16" | 54 | 1.6875 | 42.86 | |||
| 1.23/32" | 55 | 1.71875 | 43.66 | |||
| 1.3/4" | 56 | 1.75 | 44.45 | |||
Cotton Staple Length Conversion Chart: A Must-Have Tool for Textile Professionals
Understanding cotton staple length is essential in the textile industry, especially for spinners, yarn manufacturers, and traders. The length of a cotton fiber — also known as its staple length — directly impacts the strength, softness, and quality of the yarn produced. To bridge the gap between international standards and provide easy conversions, we’ve developed a comprehensive Cotton Staple Length Conversion Chart.
What Is Cotton Staple Length?
Cotton staple length refers to the average length of individual cotton fibers in a bale. Longer fibers tend to produce stronger and finer yarns, while shorter staples are more affordable and used in coarser applications. Cotton is typically classified into:
- Short Staple (below 1 inch)
- Medium Staple (1.00 to 1.28 inch)
- Long Staple (1.29 to 1.34 inch)
- Extra-Long Staple (above 1.35 inch)
These categories play a vital role in deciding the end-use of cotton, from high-quality apparel to basic textiles.
Why Use a Conversion Chart?
Different countries and textile bodies use various units to represent staple length: inches, 32nds, decimals, millimeters, and USDA grade references. For instance:
- 1.1/8″ = 1.125 in decimals = 36 in 32nds = 28.58 mm
- USDA Upland and USDA PIMA classes use unique grading ranges like 1.05–1.07, 1.37–1.42, etc.
Our chart bridges all these standards, making it easy to:
- Convert between imperial and metric units
- Match USDA cotton grades with actual measurements
- Identify cotton classes for purchasing or production decisions
Benefits of Using Our Cotton Staple Length Chart
- ✅ Simplifies sourcing from global suppliers
- ✅ Saves time in textile sampling and lab testing
- ✅ Improves yarn prediction and machinery compatibility
- ✅ Enhances negotiation by aligning quality claims
Whether you are in spinning, weaving, quality assurance, or raw cotton trading, this chart acts as a ready reckoner.
Who Should Use This Tool?
Our Cotton Staple Length Conversion Chart is perfect for:
- Textile engineers
- Spinning mills and ginning companies
- Cotton exporters and importers
- Research & development departments
- Educational institutions
Access the Chart Now
Explore the full Cotton Staple Length Conversion Chart on our website. It’s interactive, easy to update, and tailored to modern industry requirements.
Final Words
In today’s global textile market, having access to reliable cotton staple length data helps improve productivity, quality control, and commercial decisions. Bookmark this chart for quick reference, and stay ahead in cotton-based manufacturing.
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