Leather Bag Tech Pack Checklist: What Every Spec Sheet Must Define

A tech pack is a development document, not a reference photo with annotations — the distinction determines how many sampling rounds a project needs and how much those rounds cost. Treat it as the single document that could be handed to any competent leather goods factory and produce an identical result without further explanation.

Why Do Buyers and Factories Keep Misinterpreting the Same Order?

The pattern repeats often enough to be predictable: a buyer sends a reference photo and a verbal description, the factory interprets it, and the first sample comes back with the strap too long, the pocket in the wrong position, or hardware in the wrong finish. A second sampling round follows, and the launch window slips by weeks.

The underlying cause is rarely a capability gap — most factories can execute to a tight specification. The gap is almost always in what was actually specified versus what was assumed. A tech pack closes that gap by converting every assumption into a documented decision before cutting begins.

What a Tech Pack Is — and What It Is Not

A tech pack is not a mood board, a Pinterest collection, or a reference photo with annotations. Those are useful inputs, but they are not specifications. A tech pack is the complete reference document: measured technical drawings, a material spec sheet, a hardware bill of materials, interior layout, construction notes and branding placement, all in one package.

No tech pack is complete on the first attempt — sampling will always surface ambiguities that need resolving. But a well-prepared document reduces the number of sampling rounds required and eliminates the most expensive production errors: wrong dimensions, wrong hardware finish, wrong material grade, wrong construction method.

What Should the Technical Drawings Section Include?

Every view of the bag needs to be drawn and dimensioned: front, back, side (both sides if they differ), top and bottom. Any bag with functional interior organization also needs an interior view showing pocket placement and lining details.

Dimensions must be given in millimeters, not centimeters or inches — factories work in millimeters, and any unit conversion introduces rounding error that compounds across components. All dimensions should be finished dimensions: the size of the completed bag, not the cut panels before assembly.

The drawing itself does not need to be a CAD rendering. A clean, measured hand drawing scanned at high resolution is acceptable to most factories. What is not acceptable is a freehand sketch without measurements, or a reference photo with estimated dimensions — photographs distort proportions, and estimates compound through production.

Dimensions to always specify on this section:

• Overall width, height and depth at the widest, tallest and deepest points
• Strap width, length (shortest and longest adjustment) and attachment point position
• Handle drop height (distance from the top of the handle to the top of the bag)
• Flap depth, if the design includes one
• Pocket dimensions and placement, measured from the top, sides and bottom of the bag
• Hardware placement, measured from edges and center alignment

How Should Materials Be Specified on the Tech Pack?

The material section needs to document leather grade, hide type, tannage method, thickness, finish type and color for every leather panel in the bag. Body panels, straps, handles, trim pieces and lining may each carry a different specification — list them separately rather than assuming one grade covers the whole bag.

For color, provide a Pantone reference from the Leather Color palette specifically, not the standard Fashion + Home + Interiors palette — the two systems reference different physical standards. If a Pantone leather reference is not available, a physical swatch is the next-best option. Color should never be specified in words alone: "tan," "camel" and "cognac" read differently across screens, lighting conditions and individual judgment.

Hardware needs its own material specification: base metal (zinc alloy versus brass), plating finish (gold-tone, silver, antique brass, matte black) and surface treatment (shiny, brushed, sandblasted). A photograph or physical sample of any specific hardware reference removes the remaining ambiguity.

What Belongs in the Stitching Specification?

Stitching defaults vary by factory. Without an explicit specification, the factory applies whatever thread color, weight and stitch density it normally uses for similar bags — often acceptable, but expensive to correct once production has started if it is not what the project needed.

Specify thread color (Pantone reference or physical swatch), stitches per inch for body seams and any decorative topstitching, thread weight (typically #69 for lightweight bags, #92 for medium weight, #138 for heavy), and whether specific seams should be hand-stitched (saddle stitch) or machine-stitched.

How Should the Hardware Bill of Materials Be Structured?

List every metal component in the bag with quantity, type, finish and approximate size. For standard components — D-rings, swivel clasps, O-rings, rivet sets, zippers — reference the standard size designation where one exists.

For zippers specifically: state YKK explicitly if required, since factories default to domestic zipper brands unless a brand is called out. Specify the zipper gauge (size 3, 5 or 8 are most common for handbags) and the slider style (standard, locking, teardrop pull).

For custom hardware — a logo plate, a branded clasp, a non-standard pull shape — include a 3D render or physical sample. Custom hardware development typically adds four to six weeks to the project timeline and carries its own MOQ, usually in the 200–500 piece range per component. Confirming custom hardware early lets that development run in parallel with bag sampling rather than sequentially after it.

What Should the Interior Layout Section Cover?

The interior of a bag is the section most often under-specified, and the source of the least pleasant sample surprises. Document the complete layout: lining material and color, pocket count and type (open slip, zipper, or phone-specific), pocket dimensions, card slot count and dimensions where applicable, key clip position, and any structural elements such as a base board or internal frame.

If a specific lining fabric is required, include a swatch or spec. If the project is open to the factory's standard lining, state that explicitly — removing ambiguity here speeds up the first sampling round measurably.

What Construction Method Details Need Documenting?

Construction notes cover how the bag is built, not what it looks like. This includes how handles and straps attach to the body (riveted, stitched through, D-ring loop), how panels are joined (glued and stitched, or stitched only), how the lining is attached (glued at the edges, or stitched around the perimeter), how base feet are installed (pronged through the base, or recessed into the bottom panel), and how edges are finished (painted, burnished, taped, or folded and stitched).

Factories default to a standard answer for each of these. If the project's preferred method matches the factory's standard, no note is needed — it will be executed correctly by default. If it differs, state it explicitly: "standard edge finish" and "hand-burnished edge finish" differ significantly in both production time and cost, and an unstated assumption on either side produces a sample that matches neither expectation.

How Should Branding Placement Be Specified?

If brand identity needs to appear on the bag — a debossed logo on the front panel, an embossed plate on the strap, a branded interior label — specify the placement in millimeters from fixed reference points (for example, centered horizontally, 65mm from the bottom edge of the front panel), the deboss or emboss dimensions and depth, the label type (woven, printed, leather, or metal), and the label's placement inside the bag.

How Should a Tech Pack Be Sent to a Factory?

Format affects how usable the document is in practice. A single 40-page PDF with everything merged into one undifferentiated document is harder to work with than a well-organized package. The most factory-friendly structure is:

• One PDF with numbered sections: cover sheet, views and dimensions, material spec sheet, hardware BOM, interior layout, construction notes, branding spec
• Separate high-resolution image files for reference photos or swatch photos, rather than embedding them at low resolution inside the PDF
• A concise cover email naming the style, the purpose of the document (initial sampling request), the target timeline, and a short list of any points the buyer already knows are ambiguous

Ask the factory contact to confirm receipt and flag anything unclear before sampling starts. A factory that reads the document and returns a list of clarifying questions is engaging with it seriously. A factory that responds "no problem, understood" with zero questions has, in most cases, not read it in detail.

What Should Happen When the Tech Pack Is Not Complete Yet?

Waiting for a fully complete tech pack before engaging a factory is a common and costly delay — the document is rarely complete on the first pass, and waiting for completeness can push the sampling timeline back by weeks or months for no quality benefit.

The more effective approach is a staged document. Send the factory what is confirmed, with clear annotations on the sections still being finalized, and ask them to begin sampling on the confirmed elements while flagging the pending decisions. In practice, a factory can often begin cutting and assembly with roughly 80% of the specification locked, while the remaining details — typically hardware finish and branding placement — are confirmed in parallel. This sequencing can save several weeks on the overall development timeline without adding risk to the finished product.

What Should Be Confirmed Before the Tech Pack Goes to Sampling?

Celynora's standard terms for custom development: genuine leather starts at an MOQ of 100 units per style; non-leather materials (canvas, nylon, vegan leather) start at 300 units per style. Sample lead time runs 7–10 days from a confirmed tech pack; bulk production lead time runs approximately 15 days after sample approval. Sampling cost is confirmed once the material spec, hardware BOM and construction notes are reviewed, since each of those sections affects cost independently.

A short pre-send checklist:

1. Technical drawings include finished dimensions in millimeters for every panel and attachment point
2. Material and color are specified with a Pantone reference or physical swatch, not a word description
3. Hardware BOM lists every component with finish, size and brand where it matters
4. Interior layout and construction notes are documented, or explicitly marked as "factory standard"
5. Branding placement, if applicable, is measured from fixed reference points

Submit a tech pack or a reference sample and the factory will confirm which sections are ready for sampling and which need clarification before cutting begins.

For related sourcing guidance, see Custom Tote Bag Sourcing and From Sketch to Sample.

For reference, our current catalog includes styles such as the Retro Messenger Postman Shoulder Satchel — useful as a specification baseline when briefing your own factory or sourcing agent.