Flat Poly Bags
Over 1,000 sizes. The all-purpose bag for parts, apparel, and food.
Order before 4pm EST for Same-Day Shipping!
Wholesale poly bags and plastic bags
Poly bags are plastic bags made from polyethylene, the clear, flexible film that protects parts, food, retail goods, and shipments. Pick the wrong thickness and it costs you. Too light and you get tears and returns. Too heavy and you pay for material you don't need across thousands of units. We stock 3,000+ sizes in 1 mil to 8 mil, so you match the bag to the job.
Poly Bag Types
Poly bags come in a few core formats. Pick the shape that fits how your product loads, then choose the thickness.
Gusseted Poly Bags
Expandable pleated sides hold bulky items. Great for food and hardware.
Flat Poly Bags on Rolls
Perforated on a roll for fast, one-hand dispensing at the pack station. 2 mil to 6 mil.
Gusseted Poly Bags on Rolls
Pleated sides plus roll dispensing for tall or bulky loads and box liners. .5 mil to 4 mil.
White Block Poly Bags
A white write-on panel so you can label contents by hand. Keeps parts and inventory organized.
Custom Printed Poly Bags
Put your brand on the bag. Get 2 free hours of art time when you order, a $375 value.
Need a custom poly bag size or print?
Custom sizes, up to 6-color printing on your artwork. Tell us the spec. We'll quote it, with 2 free hours of art time included, a $375 value.
Other Poly Bag Styles
Same polyethylene, built for a specific job. All in stock and ready to ship.
Liners & Covers
Large-format poly liners and covers for drums, boxes, pallets, and freight.
Mailers & Reclosable
What thickness of poly bag do I need?
It comes down to the weight and edges of what you're packing. Light items like apparel and literature do fine at 1 to 2 mil. Heavier or sharp-edged parts need 4 mil or more. Thickness is measured in mils, and one mil is a thousandth of an inch. Here's a quick guide by weight class.
| Thickness | Weight Class | Common Uses |
|---|---|---|
| 1 mil | Extra Light Weight | Literature, apparel, light parts |
| 1.25–1.5 mil | Lightweight to economy | Jewelry, small parts, office supplies |
| 2 mil | Standard weight | The most popular. Parts, clothing, food storage |
| 3 mil | Medium weight | Heavier parts and mixed loads |
| 4 mil | Heavy duty | Hardware and dense or edged parts |
| 6 mil | Super heavy duty | Abrasive or heavy industrial items |
| 8 mil | Industrial weight | The heaviest items and long-term storage |
What are poly bags made of? LDPE, LLDPE, and HDPE
Poly bags are made from polyethylene, and the three common types are LDPE, LLDPE, and HDPE. They're all polyethylene, but the density changes how the bag feels and how much abuse it takes. Most flat and gusseted poly bags are LDPE or an LDPE and LLDPE blend. Here's how they compare.
| Material | Feel | Best For |
|---|---|---|
| LDPE | Soft, clear, and flexible | Most flat and gusseted poly bags, where you want clarity and an easy feel |
| LLDPE | Tougher, stretchier, more puncture and tear resistant | Heavy or sharp-edged parts. Often blended with LDPE for strength without added thickness |
| HDPE | Stiff, crinkly, milky, strong moisture barrier | Produce, deli, and liner uses where stiffness and a moisture barrier matter more than clarity |
What's the difference between flat, gusseted, and on-roll poly bags?
Flat poly bags are two-dimensional with an open top, the simplest and most common format. Gusseted bags add expandable pleated sides for bulky or tall items, and on-roll bags come perforated on a roll for fast dispensing at the pack station. White block bags add a write-on panel for labeling by hand.
| Format | Shape | Best For |
|---|---|---|
| Flat | Two-dimensional, open top | Flat or lightly shaped items. The all-purpose bag |
| Gusseted | Expandable pleated sides | Bulky or tall items that need depth |
| On Rolls | Perforated, on a roll | Fast, one-hand dispensing at the pack station |
| White Block | Flat, with a write-on panel | Labeling contents by hand in ink |
See how poly bags work
Frequently asked questions about poly bags
Yes. Poly bags are plastic bags made from polyethylene. Poly is short for the plastic they're made from. If you're shopping for plastic bags to hold parts, food, retail goods, or shipments, poly bags are what you want. Buyers and suppliers use both names for the same product, so you'll see poly bags and plastic bags used to mean the same thing.
Poly bags protect and package products across food, retail, industrial, and shipping. In food and beverage, they hold bread, produce, and dry goods. In retail, they bag apparel, toys, and electronics. On the industrial side, they hold hardware, machine parts, and medical supplies. The right bag comes down to matching the thickness to the weight and edges of what you're packing.
Yes. interplas.com is a family-owned wholesale supplier and manufacturer, so you buy plastic bags factory direct in case and bulk quantities. In-stock orders placed before 4pm EST ship the same day, backed by our Lowest Price Guarantee.
The main types are:
- Flat poly bags: the most common. Best for lightweight items like apparel and electronics.
- Gusseted poly bags: expandable sides hold more, so they suit bulky items like food and hardware.
- On-roll poly bags: perforated on a roll for fast dispensing at the pack station.
- White block poly bags: a write-on panel for labeling contents by hand.
- Heavy-duty poly bags: thicker film for heavy or sharp-edged items.
All three are polyethylene. LDPE (low-density) is soft, clear, and flexible, and it's what most flat and gusseted poly bags are made from. LLDPE (linear low-density) is tougher and more puncture and tear resistant, so it's often blended with LDPE to add strength without added thickness. HDPE (high-density) is stiffer, crinklier, and more milky, with a strong moisture barrier, common for produce, deli, and liner uses. Choose LDPE for clarity and feel, an LDPE and LLDPE blend for durability, and HDPE when stiffness and a moisture barrier matter more than clarity.
Match the thickness to the weight and edges of your product. Light items like apparel do fine at 1 to 2 mil. Heavier or sharp parts need 4 mil or more, and abrasive or industrial items call for 6 to 8 mil. See the thickness guide above for a quick breakdown by weight class.
Many poly bags are recyclable as film at store drop-off points, since they're made from polyethylene. Curbside programs vary, so check with your local recycler for what they accept.
Right here. interplas.com stocks 3,000+ poly bag sizes, factory direct, ready for same-day shipping on in-stock orders placed before 4pm EST. Need help choosing? Call a packaging expert at 1-800-820-4722.
We're a flexible packaging manufacturer and wholesale supplier, so you buy poly bags and plastic bags factory direct in the exact size and thickness your job needs. No layers of markup, no minimums that don't fit, no waiting on made-to-order stock. 3,000+ Poly Bag sizes in stock, same-day shipping, lowest price guarantee, factory direct, family-owned, custom printed solutions and food-grade options available.
