Sourcing

Custom Pins RFQ Line by Line: The Specs Buyers Miss

Why most pin RFQs fail at the spec line level

The usual problem is not that a buyer lacks a design file. It is that the RFQ leaves too many decision points open, so suppliers quote different builds, different finishes, and different assumptions about what “same as sample” means. That creates quote noise, sample churn, and preventable rework after artwork approval. For custom pins, the smallest missing line item can change unit cost by 10–30% and add 3–7 days if the factory has to ask follow-up questions.

A good RFQ for enamel pins should read like a production spec sheet, not a marketing brief. The factory should be able to confirm metal type, size, thickness, plating, fill style, attachment, packing, and acceptance criteria without guessing. If you already buy keychains, coins, or badges, the same discipline applies, but pins are less forgiving because tiny line widths, cavities, and edges show defects faster.

This article walks the RFQ line by line, in the order a factory normally checks it. The goal is to help procurement teams, distributors, and brand owners write a request that gets comparable quotes from the first round. ZheCraft sees the same failure points repeatedly in Yiwu production, and most of them are specification gaps rather than manufacturing limitations.

Line 1: product type, size, and profile

Start with the exact product type: soft enamel pin, hard enamel pin, die-struck metal pin, printed pin, or mixed-process pin with epoxy. Then define the outer dimensions in millimeters, not “small” or “medium,” because a 28 mm pin and a 32 mm pin are not the same tooling, metal consumption, or plating cost. If the shape is irregular, state the maximum height and width separately, and indicate whether cutouts are allowed inside the silhouette.

For thickness, common production ranges are 1.0–1.2 mm for slim soft enamel, 1.2–1.5 mm for standard soft enamel, and 1.5–2.0 mm when a heavier hand feel is needed. Hard enamel often needs more metal reserve for polishing, so a quoted thickness below 1.2 mm can be a red flag unless the design is very simple. For pins with 3D elements or heavy debossing, ask the factory to confirm minimum metal thickness at the thinnest point, not just the overall finished thickness.

ZheCraft typically treats the size line as the first cost driver after mold complexity. If you do not specify tolerance, use a practical target like ±0.5 mm for the outer profile and ±0.3 mm for critical internal cutouts on standard production. Tightening tolerance below that can be possible, but it should be reserved for special fit-up requirements because it increases tooling inspection and rejection risk.

Line 2: material and base metal grade

Base metal should be named explicitly. The most common options are iron, brass, copper, and zinc alloy, each with different tooling behavior, weight, and finish quality. Iron is usually the lowest-cost option for stamped pins, brass gives cleaner detail and better polishing, copper is useful for premium finishes and sharper edges, and zinc alloy is better for deep 3D or cast shapes that cannot be cleanly struck.

If the design includes fine text, thin borders, or tight cavities, brass is usually safer than iron because it holds detail better and reduces edge fuzz after finishing. If the piece is large and sculptural, zinc alloy may be the only practical route, but it often needs more cleanup and a more careful plating plan. For budget programs, ask for both a target material and one acceptable alternate, because that lets the supplier quote a fallback without changing the design intent.

Use a short checklist in the RFQ so the factory cannot drift into assumptions. If you are sourcing through ZheCraft, we usually recommend stating the base metal first and the finish second, rather than asking for “best price” and expecting the factory to optimize the rest for you. That keeps the quote apples-to-apples across suppliers and makes sample approval much faster.

• Base metal specified as iron, brass, copper, or zinc alloy
• Target finished thickness stated in mm
• Acceptable material alternates listed if cost-sensitive
• Minimum detail requirement called out for text or borders
• Any magnet, clasp, or pin-post load requirement stated

Line 3: plating finish and thickness

Plating is where many RFQs become vague. Do not stop at “gold” or “nickel”; specify the finish family, the visual tone, and whether antique or polished is acceptable. Common choices include bright gold, shiny silver, black nickel, antique brass, antique copper, and matte black nickel. If your brand is sensitive to color tone, reference a physical sample or a clear visual standard, because “gold” can mean anything from pale champagne to deep warm brass.

For thickness, a practical procurement range is 0.03–0.05 microns for decorative flash plating and around 0.1 microns or higher for more robust decorative finishes, depending on the factory’s process and substrate. Higher thickness does not automatically mean better outcome; poor surface prep can still produce dullness, uneven tone, or edge buildup. The better question is whether the factory can hold consistent plating coverage on raised edges, recessed grooves, and pin posts.

If the order must survive handling, retail display, or outdoor use, ask whether the plating is sealed or top-coated and whether the process is compatible with the base metal. Black nickel and antique finishes are often more forgiving visually than mirror finishes, but they can also hide small scratches that later show up during replenishment reorders if the reference sample is weak. For premium programs, specify a visible surface standard and a rejection rule for discoloration, pitting, and edge burn.

Line 4: color system and fill method

Enamel color should be specified by Pantone code where possible, but the RFQ should also say whether the supplier must match to coated or uncoated references and whether a delta is acceptable under factory lighting. Soft enamel and hard enamel are not just aesthetic choices; they change the amount of color recession, polishing step, and perceived color depth. If the design has gradients, halftones, or photo detail, then the RFQ should say whether those areas are printed, UV coated, or omitted.

For solid spot colors, the buyer should identify how many colors are in the design, which areas are filled, and which areas must remain bare metal. A useful rule is to treat every color as a separate production input, because each one increases fill work and raises the chance of edge bleed if the line widths are too narrow. If transparent enamel or glitter is used, specify the exact zones, because those effects can change the apparent tone of adjacent colors.

In a clean RFQ, the color section should be concise and machine-checkable. A supplier can quote faster if the design file is paired with a color schedule that names each fill area and its finish behavior. ZheCraft sees fewer production questions when buyers separate color intent from artwork file discussion, because the factory can then validate line width, cavity depth, and curing risk independently.

Color Spec Line	What to State	Why It Matters
Pantone reference	Coated or uncoated code	Prevents tone disputes
Fill type	Soft enamel, hard enamel, print, or transparent	Changes process and polishing
Color count	Exact number of filled areas	Affects labor and quote
Metal exposure	Which lines stay exposed	Controls visual contrast
Special effects	Glow, glitter, pearl, UV	Needs separate approval

Line 5: attachment, back side, and wear behavior

The back side is not a generic detail. It affects user comfort, garment damage, and return rates. For lapel-style pins, specify butterfly clutch, rubber clutch, deluxe clutch, magnetic back, safety pin, or brooch-style fastener. If the pin will be worn on delicate fabric, say so in the RFQ, because a sharp post or oversized clutch can damage garments even when the front looks perfect.

If rotation matters, ask for dual posts or anti-rotation features and state the pin orientation requirements. For larger pins, one post may sag or twist over time, especially if the metal body is wide or asymmetric. A practical rule is that anything above roughly 35 mm wide should be checked for balance and backing behavior, not just front appearance.

Also specify whether the back needs a smooth finish, backstamp, or recessed logo, and whether the post length must suit a particular garment thickness. This is one of the most common hidden causes of returns: a beautiful front with a post that is too short for jackets or too long for thin shirts. If your program includes merch bundles, keep the attachment spec identical across reorder lots so the user experience stays consistent.

Line 6: artwork constraints and approval rules

The artwork section should not only include a vector file. It should state the minimum line width, minimum gap, and whether tiny text is allowed to be simplified by the factory. On enamel pins, too-thin lines can close up during polishing or fill overflow, while tiny open spaces can disappear entirely after plating and curing. If the design contains micro-details, tell the supplier which elements are mandatory and which can be simplified without changing the brand message.

For approval, define what counts as an acceptable pre-production sample. The sample should match the agreed shape, size, finish, color family, and attachment type, but you should also call out acceptable variation in hand-polished surfaces and tone shift under different lighting. If you do not define that, a supplier may think a small variation is normal while the buyer sees it as rejection-worthy.

The most efficient RFQs include one short rejection rule set. For example: no broken lines, no exposed base metal in filled areas, no visible plating pits on front face, no major color overflow, and no attachment misalignment beyond the stated tolerance. ZheCraft often recommends adding one photo of an approved prior product if the new order needs to sit visually inside an existing brand family.

Line 7: packaging, carton spec, and shipment control

Packaging is where otherwise solid pin orders become expensive after the fact. State whether each pin needs a polybag, backing card, OPP bag, velvet pouch, or boxed packing, and whether the packaging is retail-ready or only transit-ready. If cards are used, specify card size, stock thickness, print method, and whether holes must align to a single post, dual posts, or safety pin backing.

For master cartons, ask for carton dimensions, carton count, and packing method that protects the plated surface from rubbing. A reasonable carton spec for small pin orders is often 200–500 pieces per master carton, but the right count depends on product weight and the packaging structure. If the order ships with mixed SKUs, ask for segregation labels and a carton packing list so receiving teams can count by SKU without opening every bag.

The reason to include this line in the RFQ is simple: packing affects both damage rate and labor cost. A “free packing” assumption can make one quote appear cheaper while silently shifting risk onto the buyer at destination. For promotional programs, we normally advise buyers to decide early whether packing is a cost center or part of the retail presentation, because that choice changes quote comparison more than many buyers expect.

What to do next before you send the RFQ

Before sending the request, turn the design into a one-page spec sheet with these fields: product type, size, thickness, base metal, plating, enamel type, color count, attachment, artwork rules, sample criteria, packing, and target quantity. Then check for contradictions, especially where a premium look is paired with a budget metal or where a delicate design is paired with aggressive cost targets. The best RFQs are short enough to read in one pass, but complete enough that three different suppliers would quote the same build.

• Confirm exact dimensions in mm, including cutouts
• Choose one base metal and one acceptable fallback
• State plating finish plus acceptable visual tone
• List enamel type, color count, and special effects
• Define attachment, backing, and wear constraints
• Set sample acceptance rules before mass production
• Specify packing and carton control requirements

If you are comparing suppliers, send the same RFQ to all of them and prohibit alternative builds unless separately labeled as options. That makes price differences meaningful instead of confusing, and it exposes which factory is actually optimizing process versus simply omitting cost drivers. If you want, ZheCraft can help convert a rough design into a production-ready spec sheet so the quote round is cleaner and faster.

Have a project? Send your artwork and target quantity and we’ll reply with a detailed quotation within 12 working hours.