A garment BOM (bill of materials) for clothing manufacturing is a controlled component list that identifies every fabric, trim, label, decoration, and packaging item required for one finished garment — and each row should state the material specification, color, placement, unit, consumption status, source reference, approval status, and applicable style, size, or colorway.
(Last modified date: August 31, 2026)
Key Takeaways
- A BOM defines what the factory must source, cost, use, and pack — it is not a substitute for the tech pack or PO.
- Give every component a unique row with specification, color, supplier reference, and consumption.
- Version control and change approval prevent cost and quality drift.
- An accurate BOM makes factory quotes comparable even when details are pending.
What Is a Garment BOM and How Does It Differ From Other Documents?
A garment bill of materials defines what physical components the factory must source, cost, use, and pack. It may sit inside a tech pack, but it is not a substitute for the tech pack, measurement chart, RFQ, or purchase order. The BOM covers shell fabric, lining, rib, interlining, thread, closures, labels, decoration materials, hangtags, bags, stickers, and cartons, plus approved supplier references and consumption per finished unit.
- Tech pack: how the garment looks, fits, and is constructed.
- Measurement chart: dimensions, points of measure, grading, tolerances.
- RFQ: what to quote, in what quantities, for which destination.
- Purchase order: approved styles, quantities, prices, terms, delivery.
What Fields Should an Apparel BOM Template Include?
Record category, item number, description, placement, specification, color, supplier reference, unit of measure, usage basis, applicable variants, approval status, and notes. Add a header with brand, style name and number, product type, base size, version, and date.
Which Specifications Are Needed for Fabrics, Rib, and Thread?
- Fabric composition, weight (GSM), construction, and color.
- Rib and interlining type, width, and stretch.
- Thread type, color, and ticket number.
- Consumption per unit and waste allowance.
How Should Trims, Labels, Decoration, and Packaging Be Listed?
List zippers, buttons, snaps, cords, and labels with exact specs and placement; decoration items with artwork references and technique; packaging with bag type, barcode, and carton details. Each gets its own row and supplier reference.
How Do Style, Color, Size, and Consumption Affect BOM Accuracy?
Consumption varies by size and colorway; note whether the usage is per base size, per size, or per color. This prevents under-ordering fabric or over-quoting trims.
How Can Buyers Make Factory Quotes Comparable When Details Are Pending?
Separate “fixed” from “pending” fields, define assumptions, and ask factories to quote on the same baseline. A structured BOM makes side-by-side quotes meaningful. See LSLONG OEM & ODM services.
How Should BOM Version Control and Change Approval Work?
Number every version, log changes with dates and approvers, and require written approval before production. Uncontrolled changes are a leading cause of cost overruns and quality drift.
Frequently Asked Questions
What is the difference between a BOM and a tech pack?
A BOM lists materials and components; a tech pack describes construction, fit, and artwork. They work together.
Who builds the garment BOM?
The buyer usually builds it from the design; factories can also draft it for approval.
Why does consumption per unit matter?
It drives fabric and trim ordering, costing, and quote comparison.
How often should a BOM be updated?
Whenever materials, specs, or versions change — always with documented approval.
Related Articles
Official Resources
References
- Apparel sourcing best practices for BOM and tech pack management.
- LSLONG BOM review documentation, 2026.