PE Bag Size Guide – Standard Dimensions for Small Business
If you're a small business ordering custom PE bags for the first time, the hardest question is often: what size do I need?
This guide covers standard PE bag dimensions, how to measure for your product, and which bag type fits different use cases. Whether you need custom flat bags, zip lock bags, or self-adhesive bags, this will help you get the size right the first time.
How to Measure a PE Bag
PE bags are measured in three dimensions: Width (W) × Length (L) plus optional Gusset (G). All measurements are taken with the bag lying flat.
✓ Measuring tips:
• Width — Measured across the opening of the bag
• Length — Measured from the opening to the bottom seal
• Gusset — The expandable side panel that allows the bag to hold more volume (for gusset bags only)
• Always measure in millimeters (mm) or inches — be consistent when sending specs to your factory
A general rule: your bag should be 15-25% larger than your product on each dimension to allow easy insertion without being too loose.
Standard PE Flat Bag Sizes
Flat bags (open-top bags) are the most common type. Here are standard sizes used across different industries:
| Size (W×L) | Common Use | Recommended Thickness |
|---|---|---|
| 3" × 5" (75×125mm) | Jewelry, small parts, screws | 0.03-0.05mm |
| 4" × 6" (100×150mm) | Cosmetics samples, small hardware | 0.03-0.05mm |
| 6" × 9" (150×230mm) | Small apparel, books, phone accessories | 0.04-0.06mm |
| 8" × 10" (200×250mm) | T-shirts, folded shirts, documents | 0.04-0.06mm |
| 10" × 13" (250×330mm) | Larger apparel, sweaters, packaged goods | 0.05-0.08mm |
| 12" × 15" (300×380mm) | Jackets, multi-item orders, larger products | 0.05-0.08mm |
| 14" × 20" (355×500mm) | Bulk items, large textiles, bedding | 0.06-0.10mm |
Note: All sizes can be customized. The above are common starting points used by many businesses.
Standard Zip Lock Bag Sizes
Reclosable zip lock bags are popular for retail packaging and sample kits. Add about 25mm to the length for the zip closure channel.
| Size (W×L) | Common Use | Material Options |
|---|---|---|
| 2" × 3" (50×75mm) | Small samples, beads, pills | LDPE, CPE |
| 3" × 4" (75×100mm) | Jewelry, small parts kits | LDPE, CPE |
| 4" × 6" (100×150mm) | Cosmetics, cables, screws | LDPE, CPE |
| 6" × 8" (150×200mm) | Small apparel, accessories | LDPE, CPE |
| 8" × 10" (200×250mm) | T-shirts, folded apparel | LDPE, CPE |
| 10" × 12" (250×300mm) | Sweaters, larger products | LDPE, CPE |
Need custom zip lock bags? See our full zip lock bag options and pricing →
Standard Self-Adhesive Bag Sizes
Self-adhesive (peel-and-seal) bags are ideal for products that need a secure but easy-to-open seal — popular in e-commerce and retail.
| Size (W×L) | Common Use | Features |
|---|---|---|
| 4" × 6" (100×150mm) | Small hardware, stationery | Clear, self-sealing |
| 6" × 9" (150×230mm) | Phone cases, small items | Clear, self-sealing |
| 8" × 10" (200×250mm) | Apparel, folded items | Clear or colored, self-sealing |
| 10" × 13" (250×330mm) | Larger apparel, packaged goods | Clear or colored, self-sealing |
| 12" × 15" (300×380mm) | Jackets, multi-item bundles | Heavy-duty option available |
For more details on self-sealing options, browse our self-adhesive bags →
How to Choose the Right Size
Follow this simple process to determine your ideal bag size:
- Measure your product — Length, width, and height (or thickness in package)
- Add 20% to each dimension for easy insertion — a tight bag is frustrating to pack
- Decide bag type — Flat bag for simple packaging, zip lock for resealable, self-adhesive for easy seal
- Choose material — Check our material guide if you're unsure between LDPE, HDPE, or LLDPE
- Consider thickness — Light items can use thinner material (0.03-0.05mm), heavy or sharp items need thicker (0.08-0.15mm)
FAQs About PE Bag Sizing
Can I get non-standard sizes?
Yes. All PE bags from Pebag Factory are made to order. You can specify any size in millimeters or inches. There's no minimum size increment — we cut to your exact specifications.
What if I'm not sure which size I need?
Send us your product dimensions and photos. We'll recommend the best bag type, size, and material — free of charge. Get a free recommendation →
How much extra space should a bag have?
Aim for 15-25% extra on width and 20-30% on length. Too tight and packing becomes frustrating. Too loose and the product moves around inside, which can damage seals during shipping.
Do you offer samples to test sizing?
Yes. Stock samples are free (you pay shipping). Custom-size samples are available at a small development fee that's refundable with your first order.
Need Help Choosing the Right Size?
Tell us what you're packaging and we'll recommend the perfect bag — free of charge.
Get Free Sizing Advice →📥 Download Our Full Size Guide & Catalog
Complete dimension reference for all bag types, plus pricing for small-batch orders.
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