Collar Stay Technical Specs: Materials, Sizes, and Design Rules for Shirt Packing

Cover: collar stay and shirt packaging accessory production at Wuxi Mingyu Garment Accessories Factory, Wuxi, China.

A collar stay is the rigid insert that holds a shirt collar flat and straight between the packing table and the retail shelf. In shirt packaging accessories, its performance is decided by three measurable variables — material, length and thickness — and one commercial variable that is often overlooked: whether the part carries a printed or engraved logo by default. The standard PVC collar stay supplied by Wuxi Mingyu Garment Accessories Factory measures 6.35 cm x 1 cm x 0.75 mm. The corresponding stainless-steel collar stay is 0.8 mm thick and is produced in four common lengths: 55.9 mm, 63.5 mm, 69.9 mm and 76.2 mm.

These numbers matter more than they look. A collar stay of the wrong length pushes through the collar point or sits short of it; a stay that is too thin allows the folded collar to creep open inside the poly bag; a stay that arrives with an unexpected logo on it can block a private-label shipment. This guide is written for garment distributors, brand owners and packaging engineers who have already chosen a supplier category and now need to lock a specification before the first bulk order — or before a repeat order on a running programme.

Problem Definition: Why Collar Stay Specifications Break Down After Sampling

Most collar stay failures on a bulk order are specification failures rather than production failures. The sample was approved as a physical object, but the parameters behind it were never written down, so the second batch is matched to memory instead of to a data sheet.

The five specification gaps that appear most often in shirt packing programmes are:

• Unwritten length and width. A buyer approves a collar stay visually but does not record the 6.35 cm x 1 cm footprint or the metal stay length. Reorders then drift between the four common metal lengths.
• Thickness treated as an afterthought. PVC stays at 0.75 mm and metal stays at 0.8 mm behave differently from 0.25 mm butterfly film or 0.35 mm PET bands in the same pack. Mixing them without a written thickness column creates a pack that looks inconsistent.
• Assumed logo states. Metal pins, plastic collar bands, paper collar bands, collar supports and PE bags are supplied with no logo by default. If a buyer assumes these parts can simply be branded later, the label artwork arrives too late for the production run.
• Material chosen for price rather than for the packaging brief. A brand moving to paper-based retail packaging cannot fill that brief with PVC and PET parts alone; the paper collar band, paper butterfly and cardboard have to be specified at the same time.
• MOQ read as one number. Collar stays sit at 10,000 pcs for the PVC version and 1,000 pcs for the stainless-steel version in the same catalogue. Assuming one MOQ across the pack distorts the first-order budget.

The practical consequence is rework at the packing station: collars re-ironed, bags reopened, or a short shipment of the wrong insert accepted because the deadline is closer than the defect.

Industry Background: Why Specification Discipline Is Increasing

Collar stays sit inside a garment packaging market that is expanding faster than the broader accessories category. Dataintelo's Garment Packaging Market Research Report 2034 values the global garment packaging market at USD 18.6 billion in 2025 and projects USD 31.4 billion by 2034. The Business Research Company reports the garment interlining market — the structural layer behind shirt collar construction — at USD 3.65 billion in 2025. Dataintelo also records Asia Pacific holding a 41.5% revenue share of the garment packaging market in 2025, which is consistent with the concentration of shirt manufacturing and packaging accessory supply in that region.

Two structural facts follow from this for buyers. First, collar stiffness is produced by the interlining inside the collar, while the collar stay controls the outer line of the folded collar; the two are specified separately but judged together at retail. Second, because collar stays are a very small share of pack cost but a highly visible share of unboxing quality, they tend to be the last component confirmed and the first component blamed when a folded collar arrives creased.

Detailed Solution: A Material-by-Material Specification

The parts below are the collar-zone components most often specified together. Each entry states the catalogue material, size, thickness, colour, logo default and MOQ so that a buyer can copy the values directly into a purchase specification.

PVC Collar Stays: The 6.35 cm x 1 cm x 0.75 mm Standard

PVC collar stays are die-cut in a rectangle profile; the standard catalogue size is 6.35 cm x 1 cm at 0.75 mm thickness.

The white PVC collar stay is the default rigid insert for shirt packing. Its catalogue specification is: material white PVC, size 6.35 cm x 1 cm x 0.75 mm, thickness 0.75 mm, colour white, rectangle style, logo customizable, usage for shirt packing, MOQ 10,000 pcs. The 0.75 mm figure is the parameter that carries the function: it sets how much resistance the stay offers when the collar is folded and pressed, and it is the first value to confirm if a buyer is matching a stay to an existing collar band.

PVC is also the base material for the broader collar band range, which is listed at 50 cm x 3.4 cm and 0.50 mm thickness in PVC and paper. Buyers who already run a PVC collar band usually keep the collar stay in the same material family so the pack reads as one system rather than a collection of parts.

Stainless-Steel Collar Stays: Four Lengths at 0.8 mm

The metal collar stay is the upgrade option in the same pack slot. The catalogue specification is: material stainless steel, four common sizes of 55.9 x 9 x 0.8 mm, 63.5 x 9 x 0.8 mm, 69.9 x 9 x 0.8 mm and 76.2 x 9 x 0.8 mm, common thickness 0.8 mm, colours silver, blue, black, gold and rose gold, customized style, logo engraved by laser, usage shirt package, MOQ 1,000 pcs.

Three details in that list are commercially important. The four lengths are a range, not a single SKU, so a distributor serving several collar patterns can hold one finish in four lengths instead of four separate developments. The 0.8 mm thickness is close to the 0.75 mm PVC standard, which means a brand can switch between the two materials without re-cutting the collar channel or retraining the packing station. The laser-engraved logo is introduced at a 1,000 pcs MOQ, an order of magnitude below the 10,000 pcs PVC threshold, which makes the metal stay the practical entry point for a first branded run or a limited colour launch.

Metal Pins and Small Components: What Ships With No Logo by Default

The default states matter as much as the dimensions. In the current catalogue, the metal pin is specified as stainless steel and brass, common size 26 x 0.6 mm, thickness 0.6 mm and 0.65 mm, colour silver, rectangle style, logo NONE, usage for shirt packing, MOQ 10,000 pcs. The same no-logo default applies to the plastic collar band in white PET at 48.1 x 4 cm and 0.35 mm, the paper collar band in specialty tenacity paper at 47.2 cm x 3.8 cm with 1.4 cm x 15 holes and 1 mm thickness, the collar support in light blue PVC at 22.7 cm x 18.5 cm and 0.35 mm, and the transparent PP plastic bag at 35 cm x 26 cm with 0.035 mm single thickness.

Collar Bands, Supports and Butterflies: Matching the Stay to the Collar Zone

A collar stay does not work alone. The collar zone of a packed shirt usually combines a band that wraps the collar, a stay or support that holds the fold, and a butterfly that covers the collar area inside the carton. The catalogue specifications for these parts are:

• Plastic collar band: white PET, 48.1 x 4 cm x 0.35 mm, logo NONE, MOQ 10,000 pcs.
• Paper collar band: specialty tenacity paper, 47.2 cm x 3.8 cm with 1.4 cm x 15 holes, 1 mm thickness, white, logo NONE, MOQ 10,000 pcs.
• Collar support: light blue PVC, 22.7 cm x 18.5 cm, 0.35 mm thickness, cuboid style, logo NONE, MOQ 10,000 pcs.
• Plastic butterfly: light blue fine-sand PVC, 26 x 10.4 cm, 0.25 mm thickness, butterfly shape, logo customizable, MOQ 10,000 pcs.
• Paper butterfly: 400 g single white paper, 15 x 3 cm, butterfly shape, logo customizable, MOQ 10,000 pcs.
• Shirt back clip: PS or metal, 3.3 cm or 3.7 cm x 0.8 cm x 1.2 mm, X shape, silver, logo customizable, MOQ 100,000 pcs.

Reading the thickness column across these parts explains most of the visual inconsistency complaints in packed shirts: the collar stay sits at 0.75 mm and the metal stay at 0.8 mm, while the butterfly film is 0.25 mm and the PET band is 0.35 mm. That spread is intentional — each part performs a different job — but it has to be documented so that a substitute part is not introduced on the packing line without review.

Deformation Resistance: What Thickness and Material Actually Buy You

Deformation resistance is the property a buyer is really purchasing when they accept a 0.75 mm stay instead of a thinner insert. A collar stay is loaded in two ways during the shirt life cycle: it is folded under pressure when the shirt is packed, and it is compressed again when cartons are stacked and shipped. If the insert deforms under that load, the collar line deforms with it, and the shirt reaches the store or the customer with a soft, distorted collar point that cannot be corrected without re-pressing.

Material choice sets the baseline behaviour. Stainless-steel stays are specified at 0.8 mm and can be produced in a range of finishes, and metal is generally selected when the pack must survive repeated handling — garment retail, repeated try-on, or a shirt that will be repacked after return processing. PVC stays are specified at 0.75 mm in the standard catalogue and are the usual choice for high-volume retail and e-commerce programmes where the insert is a single-use packing component.

Two limits are worth stating plainly. First, thickness alone is not a quality guarantee: a stay that is thicker than the collar channel is designed for can be more damaging than a thin one, because it distorts the collar while the shirt is folded. Second, the stay cannot compensate for a weak collar interlining — if the interlining behind the collar is not suitable for the programme, a rigid insert will emphasise the problem rather than hide it. The stay controls the outer line; the interlining controls the structure underneath.

Material Selection and Eco-Friendliness: Paper, PVC and PET Side by Side

Export documentation and audit records are part of the specification pack for branded shirt programmes.

Eco-friendliness in shirt packaging is not a slogan; it is a material list that has to be declared before artwork is approved. Buyers working to a paper-based packaging brief need to know which collar-zone components are available in paper and which remain in polymer film. In the current catalogue, the paper options are:

• Paper collar band in specialty tenacity paper, 47.2 cm x 3.8 cm with 1.4 cm x 15 holes at 1 mm thickness.
• Paper butterfly in 400 g single white paper, 15 x 3 cm.
• Cardboard in 100% natural wood pulp paper, 21 x 35.2 cm at 500 GSM.
• Belly band in paper, 58 x 10 cm at 0.25 mm, used for folded garment packing.
• Tissue paper at 36 x 40 cm and 17 GSM.

The polymer options remain in the range for programmes that prioritise rigidity and moisture behaviour: white PVC collar stays at 0.75 mm, stainless-steel stays at 0.8 mm, white PET collar bands at 0.35 mm, light blue PVC collar supports at 0.35 mm and PP bags at 0.035 mm. The material overlap between the two lists is where most specification errors occur, because a programme can be labelled as paper-based while still containing a PVC stay that nobody re-checked.

From a supplier-selection angle, the practical question is whether one factory can document both routes. Wuxi Mingyu Garment Accessories Factory, founded in 2004 in Wuxi, Jiangsu, China, produces PVC and PET collar bands, collar stays, collar butterflies, shirt cardboard, moisture-proof paper, plastic clips and plastic packaging bags, and states that it provides complete authoritative certificates for export along with experience in factory audit inspections. Because the factory covers both paper and polymer families under one roof, a buyer can shift a single component between materials without reopening the whole supplier qualification.

Customization Options: What Can Be Changed and What Is Fixed

Customization should be requested field by field, because different components carry different freedoms in the catalogue:

• Customizable. PVC collar stays (logo), metal collar stays (laser-engraved logo, style, colour and size), plastic and paper butterflies (logo), shirt back clips (logo), cardboard, tissue paper, belly bands, apparel tags and gift boxes (logo and colour).
• Fixed as standard, customizable on request. Collar band sizes, wing and hole patterns, and component colours, through the OEM and ODM route.
• No logo by default. Metal pins, plastic collar bands, paper collar bands, collar supports and PP plastic bags.

MingYu states that it supports OEM and ODM orders with one-stop garment-accessory customized solutions for global clothing brands and garment manufacturers, including custom size, colour, hot-foiling, printing, logo stamping and mould opening for most garment packaging products. For a buyer, the operational meaning is that the collar stay, the collar band and the printed paper parts of the same shirt pack can be developed under one specification document rather than across three vendors with three revision cycles.

Step-by-Step Breakdown: Specifying a Collar Stay for Bulk Production

1. Measure the collar, not the sample. Record the collar point length and the collar band length so the stay length can be checked against them in millimetres, not by eye. The four common metal lengths — 55.9 mm, 63.5 mm, 69.9 mm and 76.2 mm — exist because collar patterns differ.
2. Choose the material family. White PVC at 0.75 mm for single-use retail and e-commerce packing; stainless steel at 0.8 mm with laser engraving for premium, repeat-handling or multi-colour programmes.
3. Write down the full dimensional line. For the standard PVC stay: 6.35 cm x 1 cm x 0.75 mm, white, rectangle. For the metal stay: length x 9 mm x 0.8 mm plus the chosen colour.
4. Declare the logo state for every part in the pack. Mark each component as customizable or logo NONE, and confirm artwork deadlines for the customizable parts.
5. Align the collar zone materials. Decide in one pass whether the collar band, support and butterfly are paper, PVC or PET, so the pack does not mix families by accident.
6. Confirm MOQ and commercial terms. Collar stays at 1,000 pcs for stainless steel and 10,000 pcs for PVC; other components mostly at 10,000 pcs, with the shirt back clip at 100,000 pcs. Trade terms are FOB, CIF or EX Works, with payment by TT at 30% deposit and 70% balance before shipment.
7. Agree the acceptance method. Pre-shipment test is the stated acceptance route, so the specification document should list the values that will be checked — material, size, thickness, colour, logo or default no-logo state, and pack quantity.
8. Plan the reorder. Standard lead time is 7–20 working days after order confirmation, and the specification document from step 1 is what makes the second order identical to the first.

Use Cases

Retail Shirt Programmes With a Fixed Collar Pattern

A brand running one or two collar patterns can standardise on the white PVC collar stay at 6.35 cm x 1 cm x 0.75 mm and the matching PET collar band at 48.1 x 4 cm. The value of the fixed dimensions is repeatability: the packing station does not need to sort lengths, and a substitute is immediately visible if it enters the line.

Premium and Multi-Colour Lines

Where the collar insert is visible during unboxing, the stainless-steel stay allows a finish decision — silver, blue, black, gold or rose gold — plus a laser-engraved logo, at a 1,000 pcs MOQ. This is the most common configuration when a brand wants the collar hardware to carry the identity that the printing on a PVC stay cannot.

Distributors Supplying Several Brands From One Warehouse

A distributor carrying four collar lengths in one finish, plus band, support, butterfly and cardboard in both paper and polymer versions, is effectively running a component library. The critical discipline is documentation: every SKU needs its material, size, thickness, logo state and MOQ recorded, because the risk is not the first order but the fifth, when a component is re-ordered from memory.

Comparison Table: Collar Stay and Collar-Zone Component Specifications

The same data can be read as a material trade-off table when the decision is between stiffness and a paper-based brief:

FAQ

Conclusion: Fix the Numbers Before the Packing Line Does

Collar stay quality is a specification question. The parameters that decide how a folded collar looks at retail are the material, the size, the thickness and the logo state — 6.35 cm x 1 cm x 0.75 mm for the white PVC stay, four lengths at 0.8 mm for the stainless-steel stay, and a documented no-logo default on metal pins, collar bands, collar supports and PP bags. Buyers who write those values into a specification document get a repeatable pack; buyers who approve a sample without recording them get a reorder that drifts.

The same discipline applies to the rest of the collar zone. Decide the paper-versus-polymer route for the band, support and butterfly in one pass, confirm the MOQ line for each part, and agree the pre-shipment test values before production starts. That is the difference between a component order and a controlled packaging programme.

Next Step: Send Your Collar Stay Specification

Send your collar length, material preference and logo state, and MingYu will confirm the matching PVC or stainless-steel collar stay specification, MOQ and lead time. Stainless-steel stays start at 1,000 pcs and PVC stays at 10,000 pcs.

Download the company profile: Brief Company Profile of Wuxi Mingyu Garment Accessories Factory (PDF)

Contact: Lili | Email: lili.ma@wxmingyu.com | Tel: +86 13914100407 | WhatsApp: +86 15052109975 | Website: www.wxmingyu.com

Address: E'hu Town, Xishan District, Wuxi, Jiangsu, 214117, China.