How to Spec OEM Packaging: Size, Thickness, Printing, MOQ

Target Audience

This guide is designed for procurement managers, brand sourcing teams, and private-label product developers who need to place their first or next round of custom OEM packaging orders with a Chinese manufacturer. Whether you are sourcing PE bags, poly mailers, paper bags, or compostable alternatives, understanding the key specification parameters upfront will save you weeks of revision cycles, prevent costly production errors, and ensure your packaging arrives ready for brand deployment.

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What Does "OEM Packaging" Mean in Practice?

OEM (Original Equipment Manufacturer) packaging means a packaging product designed and manufactured to your brand's exact requirements — not a stock catalog item. This encompasses:

Custom dimensions (width, length, gusset depth)
Material selection (LDPE, HDPE, LLDPE, kraft, compostable blends)
Thickness specification (microns or mils, with tolerance bands)
Printing requirements (color count, Pantone matching, print method)
Closure and feature options (self-adhesive strip, zipper, die-cut handle, tear notch)
Certification compliance (GRS, FSC, ISO, FDA, REACH, RoHS)

At Xiahong Packaging, OEM orders are managed through our dedicated product lines covering 10+ product categories — from flat PE bags and self-adhesive mailers to honeycomb cushion paper and rigid gift boxes. Every order follows our Sampling → Approval → Mass Production → QC → Shipping workflow.

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1. Size Specification: Getting Dimensions Right

Bag dimensions are expressed as Width × Length (+ Gusset), measured in millimeters.

The Sizing Formula:

Width = the side-seal dimension (horizontal when the bag stands upright)
Length = the vertical dimension from seal to bottom
Gusset = the expandable side fold depth (typically 50–150 mm)

Practical Guidelines:

Measure your product's largest cross-section and add 10–20% clearance for easy insertion
For flat bags (garment bags, product bags), a 75–100 mm gusset handles most SKUs
For rigid boxes or heavy items, specify a 100–150 mm gusset or round-bottom construction
Provide a die-line template to your manufacturer to confirm fit before mass production

| Bag Type | Stock Sizes Available | Custom Range |

|----------|----------------------|--------------|

| PE Flat Bags | 15×17+5 cm to 40×50+5 cm | Up to 60×80+10 cm |

| Self-Adhesive Mailers | A4, A3, custom | 200×300 mm to 500×700 mm |

| Ziplock Bags | 100×150 mm to 400×500 mm | Fully custom |

| Paper Bags | 200×300 mm to 350×450 mm | Custom widths up to 500 mm |

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2. Thickness Specification: Durability vs. Cost

Thickness is the single most impactful cost driver and performance parameter in plastic bag ordering. It is measured in microns (μm) — the industry standard for Asian manufacturers. One mil = 25.4 μm.

Recommended Thickness by Application:

|------------|----------------------|----------|-------------|

Critical Specification Notes:

Always specify thickness as total thickness, not per-layer (for laminated bags)
Ask for a ±5 μm tolerance in your spec sheet — thinner is not acceptable
For compostable bags, confirm that thickness meets the required tensile strength standard
Heavier does not always mean stronger — LLDPE at 50 μm can outperform LDPE at 70 μm in puncture resistance

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3. Printing Specification: Method, Color, Quality

Your packaging's visual identity lives or dies in the printing stage. There are three primary OEM printing methods:

Flexographic Printing (Flexo):

MOQ: 5,000–10,000 pieces
Color range: 4–6 spot colors or CMYK
Best for: Standard PE bags, poly mailers, high-volume orders
Per-unit cost: Lowest at scale

Rotogravure Printing:

MOQ: 30,000–50,000+ pieces
Color range: 10+ colors, photo-quality reproduction
Best for: Premium brands, complex packaging graphics, fashion labels
Per-unit cost: Highest setup, lowest per-unit at volume

Digital Printing:

MOQ: 100–500 pieces
Color range: CMYK, limited spot colors
Best for: Prototypes, sample runs, ultra-low MOQ orders, limited editions
Per-unit cost: High per-unit, zero plate cost

Color Matching Essentials:

Specify Pantone (PMS) numbers for exact color matching
Allow ±5–10% variation as industry standard — color shifts are inherent in film printing
Request a physical print proof before mass production approval
For multi-color brand logos, gravure is preferred for consistency across production runs

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4. MOQ: How Much to Order

Minimum Order Quantity depends on your printing method, material, and customization level.

| Packaging Type | Standard MOQ | Low-MOQ Alternative |

|---------------|-------------|---------------------|

| PE Flat Bags | 3,000–10,000 pcs | 500 pcs (no print or stock color) |

| Self-Adhesive Mailers | 2,000–5,000 pcs | 500 pcs (digital print) |

| Ziplock Bags | 5,000–20,000 pcs | 1,000 pcs |

| Paper Bags | 1,000–5,000 pcs | 200 pcs (no handle customization) |

| Compostable Bags | 500 kg | 200 kg |

| Honeycomb Paper | 500 rolls | 100 rolls |

MOQ Optimization Tips:

Accept stock colors instead of custom Pantone to reduce MOQ by 40–60%
Order standard sizes to avoid custom tooling fees
Consider stock bags with custom branded labels for launches under 500 units
Negotiate MOQ by committing to repeat orders within 90 days

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5. Complete OEM Specification Checklist

Before submitting a purchase order, confirm these parameters with your supplier:

[ ] Dimensions — Width × Length (+ Gusset) in mm, with die-line confirmation
[ ] Material — LDPE, HDPE, LLDPE, recycled %, compostable blend type
[ ] Thickness — Specified in μm with ±5 μm tolerance band
[ ] Print method — Flexo, gravure, or digital — confirmed for volume
[ ] Color — Pantone numbers provided, physical proof approved
[ ] Closure type — Self-adhesive, zipper, heat-seal, or open-top
[ ] Certifications — GRS, FSC, ISO 9001/14001, Sedex, REACH, RoHS as applicable
[ ] Packaging quantity — Units per master carton for shipping efficiency
[ ] Lead time — Production (15–25 days typical) + shipping
[ ] Sample approval — Pre-production sample signed off before bulk run

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Common Applications by Category

| Industry | Recommended Product | Key Spec Priority |

|----------|-------------------|-------------------|

| Fashion apparel | PE garment bags, self-adhesive mailers | Thickness + print quality |

| E-commerce | Toughened poly mailers, honeycomb cushion | Puncture resistance + cushioning |

| Food & beverage | Food-grade PE bags, compostable bags | FDA compliance + barrier properties |

| Cosmetics & beauty | Clear OPP bags, rigid boxes, paper bags | Print fidelity + premium finish |

| Electronics | Anti-static PE bags, honeycomb paper | ESD protection + cushioning |

| Luxury goods | Rigid gift boxes, paper bags, honeycomb paper | Material quality + surface finish |

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Internal Product Links

/products/product-packaging-pe-bags — PE bag product lines
/products/biodegradable-plastic-bags — Compostable bag options
/products/oil-wax-glassine-bags — Glassine and specialty films
/solutions/custom-packaging — Full OEM service overview
/catalog — Complete product catalog
/capabilities — Manufacturing capabilities and certifications

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Why Xiahong Packaging for OEM Orders

Xiahong operates two integrated factories (Xiamen and Zhangzhou) with 23 production lines and an annual output exceeding 1 billion pieces. Our OEM program supports:

Full customization — Size, thickness, material, printing, closure, certification
Low MOQ flexibility — From 200-piece test runs to 10M+ bulk orders
Rapid sampling — 5–7 day sample turnaround
Production lead time — 15–25 days for standard OEM orders
Quality systems — ISO 9001, ISO 14001, Sedex, GRS, FSC, REACH, RoHS, EU PPWR
Dedicated support — Single point of contact, bilingual service, 24-hour quotation turnaround

Ready to specify your next OEM packaging order? Contact our team at fly@chinapolybags.com or request a quotation through our online form. We provide free die-line templates, sample kits, and production-ready specifications within 24 hours of inquiry.