A garment bill of materials, or BOM, records the physical components needed for a clothing style: fabrics, trims, thread, labels and relevant packaging. A useful BOM identifies each component precisely, states its unit of measure and links it to the correct colorway and approval version. It is one part of a tech pack, not a substitute for measurements, construction instructions or an agreed quotation.
For a clothing brand, the practical question is not whether the spreadsheet looks complete. It is whether another person can use it to identify the intended material without guessing. This guide provides an original handoff checklist, with hypothetical examples rather than Eking production specifications.
What Belongs in a Garment BOM?
Start with the parts that remain in or accompany the delivered product. Depending on the style, that may include shell fabric, lining, ribbing, sewing thread, elastic, fasteners, labels and individual packing materials. Do not add a zipper or drawcord merely because a template includes one. Record what the actual design requires.
Techpacker’s BOM guide describes component identities, quantities, units, costs, supplier references and approvals as useful material-list information. Keep those component details connected to the wider clothing tech pack, where the garment’s shape, measurements and construction are explained.
A Practical Component Handoff Checklist
Use the following table to review the information behind each material row. The questions are an editorial working aid, not an industry-mandated form. A clear spreadsheet can be sufficient if the supplier can read it and the version history is controlled.
| Check | Question to resolve | Avoid |
|---|---|---|
| Identity | Which exact component and specification does this row represent? | Several different materials called “main fabric.” |
| Application | Where is it used, and in which colorway or sizes? | An approved detail with no matching location. |
| Quantity basis | Is the amount per garment, per pack or for the whole order? | A number without a unit or basis. |
| Source | Is the supplier reference confirmed or only proposed? | Treating an unavailable reference as secured stock. |
| Approval | Which sample or document approves this component? | A photo mistaken for production approval. |
| Change control | Who must approve an alternative, and what needs rechecking? | A silent substitution after sampling. |
Give an unresolved row an explicit status such as “supplier proposal required” or “sample pending.” Assign a person and a next action to it. An empty cell is ambiguous: the factory cannot tell whether the information is missing, optional or intentionally not applicable.
Separate Material Identity From Consumption
A fabric description and a fabric consumption estimate answer different questions. The first identifies what should be used. The second estimates how much is needed. Confirm who will calculate consumption and what sizes, usable fabric width, pattern layout and processing assumptions the calculation uses. A swatch approval does not approve the quantity to purchase.
Keep net requirements separate from purchasing allowances. For a hypothetical 240-piece order with one neck label and one individual bag per garment, the net requirement is 240 labels and 240 bags. That does not automatically mean ordering exactly 240 of each: separately confirm spare quantities, supplier pack sizes and minimums. Do not hide an unexplained allowance inside the per-garment number.
For fabric, do not copy a consumption figure from an unrelated style. Ask the supplier to document the calculation basis and any agreed allowance. If the size mix changes, ask whether the estimate still applies. A component count is straightforward; a fabric estimate may require a production-specific calculation.
Resolve Colorways and Size-Dependent Components
A single material row may apply to every size, but some components vary. Size labels, zipper lengths or elastic lengths may require separate references. Use a colorway or size mapping that a production team can follow without relying on a conversation from several weeks earlier.
For example, a hypothetical black-and-green T-shirt order could share one label design while requiring different thread colors and size-label quantities. The important check is not the number of spreadsheet tabs. It is whether each finished style-color-size combination points to the correct component set.
Cross-check the BOM against the labels and packaging brief. A hangtag listed as a component does not describe its attachment position. A bag listed as a material does not establish the carton assortment. Link those instructions rather than expecting one short material description to cover every packing decision.
Control Substitutions With a Written Decision
If a material becomes unavailable, request the proposed alternative before approving it. Record what changes, why it changes, which styles it affects and which checks must be repeated. “Similar” is not a specification. A different fabric or trim may need review for appearance, fit, function or the planned decoration process.
Use a short change record: original reference, proposed reference, affected document version, review evidence, decision, approver and date. Do not overwrite the old row without preserving its history. Keep the current approved version easy to identify, and clearly withdraw superseded copies from the working handoff.
Material approval and commercial approval should stay distinct. A technically acceptable alternative can still change the price or timing. Request an updated scope when necessary and use a like-for-like quotation comparison before accepting changed costs.
Run a Final BOM Review Before Release
- Match every required component to the relevant sketch or instruction.
- Check the applicable colorways, sizes, units and quantity basis.
- Identify proposed materials separately from approved materials.
- Link approvals to the actual sample or document revision.
- Resolve purchasing assumptions with the responsible supplier.
- Confirm who can authorize substitutions and how changes are recorded.
Then compare the record with the physical product during sample review. The presence of a component in a BOM is not proof that it appears correctly in the sample. Conversely, an attractive sample can contain an undocumented component that needs to be captured before repeat production.
Frequently Asked Questions
Is a BOM the same as a tech pack?
No. The BOM lists material components. The tech pack also communicates matters such as garment construction, measurements, artwork and other production instructions.
Must every BOM contain supplier prices?
Not every shared version needs to expose every purchasing price. Clarify whether the document is a specification handoff, an internal cost calculation or both. Do not treat a materials subtotal as a complete finished-garment quotation.
Can a factory help complete missing material details?
You can request supplier proposals, but mark them as proposals until reviewed. Confirm who is responsible for completing each field and who approves the resulting specification.
Preparing your own garment component list? Send Eking Clothing your design brief and identify which fabric or trim details you need help clarifying. Agree the final materials and commercial scope before production.
