Sourcing Fabric: Get the Spec Right Before Swatching

Short answer: to source fabric for a clothing brand, work through five steps — define the fabric specification, request swatches and test them, agree minimums, price and lead time, approve a lab dip and a bulk sample, then place the order with inspection and test terms in writing. Fabric is the largest cost in most knit garments and the hardest thing to change later, so this process decides your margin before production even starts.

This guide walks through the process buyers actually follow, and the mistakes that cost time and money at each step.

Step 1: Define the Fabric Specification

You cannot source what you have not defined. Write a spec covering:

A vague spec produces a sample that misses. This one document prevents most sourcing failures.

Step 2: Request Swatches and Shortlist Mills

Approach several mills, not one:

Shortlist two or three mills. A single-source fabric is a supply risk.

Step 3: Test Before You Commit

Swatches tell you feel; tests tell you performance:

A fabric that passes the hand test but shrinks 8% is a return waiting to happen.

Step 4: Agree Minimums, Price and Lead Time

Before ordering, lock the commercials:

Get these in writing, not agreed verbally over chat.

Step 5: Approve the Lab Dip and Bulk Sample

Colour is where fabric sourcing most often goes wrong:

Never approve colour from a phone screen. Approve a physical dip.

Step 6: Order With Quality and Inspection Terms

Put everything in the purchase order:

Stock Fabric vs. Custom Fabric

For a first collection, stock qualities let you move fast; custom fabric is worth it once a style is proven.

Common Fabric Sourcing Mistakes

A Practical Timeline

Overlap fabric sourcing with sampling so the two run in parallel.

Conclusion

Fabric sourcing is a process, not a phone call: define the spec, test the swatch, agree the commercial terms, approve a physical lab dip, and order with inspection and test terms in writing. Do it in this order and you protect your margin, your lead time and your quality. Skip a step and you will meet the same problems every unprepared buyer meets.

Key Takeaways for Buyers

Before you place the order

Wash the pre-production sample twice and measure it against your spec. Most of what goes wrong in bulk, shrinkage, pilling, shade drift, is visible at that stage and invisible at approval. It takes a week, and it is the cheapest insurance in the whole process.