Fit guidance reviewed September 24, 2026Flat, reclosable, gussetedInches and cm
Poly bag sizes from 2 x 3 to 36 x 48 inches with metric equivalents, linked film thicknesses for each size, a gusseted bag chart, and worked examples for choosing a starting bag size.
Parts sorting and repeat-access kits
Choose the bag style before the mil thickness
For small parts that need repeated access, compare a reclosable bag such as green PB3585G: 5 × 8 in, 2 mil, with a zipper. PB2269 is a different format: a clear 7 × 16 in, 1 mil open-ended flat bag that needs a separate closure. It is a taller alternative for a different packing need, not an exact substitute.
01
Choose repeated access
PB3585G has a reclosable zipper and green film for a bagging workflow that benefits from a color distinction.
Before choosing: The green color is not an antistatic or electronics-protection claim.02
Choose a taller clear bag
PB2269 is a 7 × 16 in open-ended bag with 1 mil film. A separate closure becomes part of the packing process.
Before choosing: It changes size, film thickness, color and closure at once; it is not a like-for-like replacement.03
Choose after a handling check
Use the loaded bag to evaluate fit, closure and the effect of the parts’ edges during your actual process.
Before choosing: Mil describes film thickness. It does not by itself establish a safe weight, puncture rating or suitability for sharp parts.Compare the exact products
Scroll the table sideways to see each product action.
| Listed size and type | Material and closure | Purchase quantity and use | Product and delivery |
|---|---|---|---|
| 5 × 8 inGreen reclosable poly bagSKU PB3585G | 2 mil polyethylene (LDPE)Reclosable zipper | 1,000 bags per caseRepeated access and color-based sorting when the contents fit. | View PB3585G and current price Use the ZIP estimator on the product page. Confirm the final total at checkout. |
| 7 × 16 inClear flat poly bagSKU PB2269 | 1 mil polyethylene (LDPE)Open-ended; separate closure required | 1,000 bags per caseTaller clear format; different size and closure workflow. | View PB2269 and current price Use the ZIP estimator on the product page. Confirm the final total at checkout. |
Product details checked September 7, 2026. Price, availability and delivery depend on the exact product and order.
What does mil tell me about a parts bag?
A mil is one-thousandth of an inch. PB3585G lists 2 mil film and PB2269 lists 1 mil film. That describes thickness, not a tested load limit or a guarantee against punctures. Consider the parts’ shape, edges, weight and handling as well.
Are these two bags interchangeable?
No. PB3585G is green, 5 × 8 in, 2 mil and reclosable. PB2269 is clear, 7 × 16 in, 1 mil and open-ended. Match the dimensions, thickness, closure and case quantity before changing a bag already used in your process.
How do I close the open-ended bag?
PB2269 needs a separate closure. Its product information lists twist ties, bag tape or an impulse sealer as closing options. Choose the method that works with your contents and packing process; it does not have the zipper supplied on PB3585G.
Can I use color alone to choose an electronics or food-contact bag?
No. Color and film thickness do not establish those requirements. Check the exact product’s applicable specifications and your intended use rather than inferring special protection or suitability from this comparison.
How do I compare the order cost?
Both listings contain 1,000 bags per case, but they serve different needs. Check each exact SKU’s current price and ZIP estimator, then confirm shipping, tax and total at checkout. Do not choose a different closure or thickness only because an item price is lower.
Matching an existing packing process?
Keep the approved SKU, dimensions, mil thickness and closure together in your reorder notes.
How poly bag sizes are written
Poly bags are sold by flat width x length in inches, measured on the outside of the bag with the opening on the short side. A 9 x 12 bag is 9 inches across the opening and 12 inches deep. Gusseted bags add a third number for the depth of the fold: 12 x 8 x 24 is 12 wide, 8 deep when opened, 24 long. Thickness is a separate spec in mil (thousandths of an inch); the mil to micron chart converts it. Measurement conventions vary. Check whether the exact product lists outside dimensions or usable space below the zipper; the same nominal size does not establish the same interior.
Starting estimate for a rectangular item: bag width = item width + item thickness + 1 in. Bag length = item length + item thickness + 2 in. These allowances are a starting point, not a fit guarantee. Compare the selected bag's usable dimensions and check closure with your actual contents before ordering a case.
Poly bag size chart: flat and reclosable bags
The links below lead to product specifications; check current availability on the exact listing. Mil measures film thickness. Thickness alone does not establish puncture resistance, load capacity, food-contact suitability, weather resistance or protection for electronics. Consider the contents and handling conditions as well. The 2 vs 4 vs 6 mil comparison goes through the trade-offs.
| Bag size (W x L) | Metric | Flat bag mils stocked | Reclosable mils stocked | What fits |
|---|---|---|---|---|
| 2 x 3 in | 5 x 8 cm | 1, 1.5, 2, 3, 4, 6 | 2, 3, 3.1, 4, 6 | Jewelry findings, screws, beads, sample chips |
| 3 x 4 in | 8 x 10 cm | 1, 1.5, 2, 3, 4 | 2, 4, 6, 8 | Earrings, USB drives, small electronic parts |
| 3 x 5 in | 8 x 13 cm | 1, 1.5, 2, 3, 4 | 2, 3, 3.1, 4, 6, 8 | Small hardware kits, sachets, SD cards in cases |
| 4 x 6 in | 10 x 15 cm | 1, 1.5, 2, 3, 3.6, 4, 6 | 2, 3, 3.1, 4, 6, 8 | Necklaces in boxes, lipsticks, single socks, small parts |
| 5 x 7 in | 13 x 18 cm | 1, 1.5, 2, 3, 4, 6 | 2, 3, 4, 6 | Phone accessories, postcards, photo prints |
| 5 x 8 in | 13 x 20 cm | 1, 1.5, 2, 3, 4, 6 | 2, 3, 3.1, 4, 6 | Cables, chargers, pens, pouches |
| 6 x 8 in | 15 x 20 cm | 1, 1.5, 2, 3, 3.6, 4 | 2, 3, 4, 6, 8 | Folded baby clothes, paperback books, greeting cards |
| 6 x 9 in | 15 x 23 cm | 1, 1.5, 2, 3, 4, 6 | 1.6, 2, 3, 4, 6, 8 | Folded kids tees, game cartridges, document folders |
| 6 x 10 in | 15 x 25 cm | 1, 1.5, 2, 3, 4, 6 | 2, 4, 6 | Long small parts, brushes, utensils |
| 7 x 10 in | 18 x 25 cm | 1, 1.5, 2, 3, 4, 6 | 2, 3, 4, 6 | Hats, folded scarves, manuals |
| 8 x 10 in | 20 x 25 cm | 1, 1.5, 2, 3, 3.6, 4, 6, 8 | 2, 3, 3.1, 4, 6, 8 | Folded T-shirts (S and M), 8 x 10 prints, notebooks |
| 8 x 12 in | 20 x 30 cm | 1, 1.5, 2, 3, 4, 6 | 2, 4, 6, 8 | Small folded garments and narrow inserts; measure first |
| 9 x 12 in | 23 x 30 cm | 1, 1.5, 2, 3, 4, 6, 8 | 1.6, 2, 2.7, 3, 3.1, 4, 6, 8 | Letter-size paper, folded shirts, flat books |
| 10 x 12 in | 25 x 30 cm | 1, 1.5, 2, 3, 3.6, 4, 6, 8 | 2, 3, 4, 6, 8 | Folded hoodies (S), magazines, small frames |
| 10 x 13 in | 25 x 33 cm | 2, 3, 4 | 2, 3, 4, 6 | Rigid mailers, photo prints with stiffener |
| 10 x 14 in | 25 x 36 cm | 1, 1.5, 2, 3, 4, 6 | 2, 3, 3.1, 4, 6 | Folded hoodies, legal documents, tablets |
| 12 x 15 in | 30 x 38 cm | 1, 1.5, 2, 3, 4, 6 | 2, 3, 4, 6, 8 | Folded sweatshirts, leggings, larger books |
| 12 x 16 in | 30 x 41 cm | 1, 1.25, 1.5, 2, 3, 3.6, 4, 6, 8 | 2, 3, 3.1, 4, 6 | Bulky hoodies, towels, 12 x 16 prints |
| 12 x 18 in | 30 x 46 cm | 1, 1.25, 1.5, 2, 3, 3.6, 4, 6, 8 | 2, 3.1, 4, 6, 8 | Long sleeve tops, rolled posters, yoga mats (folded) |
| 13 x 18 in | 33 x 46 cm | 2, 4 | 2, 3, 4, 6, 8 | Jeans, jackets, small blankets |
| 14 x 20 in | 36 x 51 cm | 1, 1.5, 2, 3, 4, 6 | 2, 4, 6 | Jackets, bedding sets, multi-unit apparel packs |
| 15 x 18 in | 38 x 46 cm | 1, 1.5, 2, 3, 4 | 2, 3.1, 4, 6, 8 | Throw pillows (small), folded coats |
| 16 x 20 in | 41 x 51 cm | 1, 1.5, 2, 3, 4, 6 | 2, 4, 6, 8 | Puffer jackets, bath towel sets |
| 18 x 24 in | 46 x 61 cm | 1, 1.25, 1.5, 2, 3, 3.6, 4, 6, 8 | 2, 3, 4, 6, 8 | Comforters (twin), large soft goods, bin liners |
| 20 x 24 in | 51 x 61 cm | 1.5, 2, 3, 4, 6, 8 | 2, 3.1, 4, 6, 8 | Pillows, stuffed toys, winter coats |
| 20 x 30 in | 51 x 76 cm | 1, 1.5, 3, 4, 6 | 2, 4, 6, 8 | Bedding (full), foam pieces, bulk apparel |
| 24 x 30 in | 61 x 76 cm | 1, 1.5, 2, 3, 4, 6, 8 | 2, 4, 6, 8 | Large pillows, sleeping bags |
| 24 x 36 in | 61 x 91 cm | 1, 1.25, 1.5, 2, 3, 4, 6 | 2, 4, 6 | Queen bedding, large foam, garment lots |
| 30 x 36 in | 76 x 91 cm | 1, 4, 8 | flat only | King bedding, large cushions |
| 36 x 48 in | 91 x 122 cm | 1, 1.5, 3, 4, 6, 8 | flat only | Furniture covers, mattress toppers, machinery parts |
Gusseted poly bag sizes
Gusseted bags open into a rectangle, so they line boxes and bins and wrap cartons without corners tearing. Pick the width and depth to match the container's inside dimensions plus an inch each, and the length to cover the height plus enough to fold over or tie off.
| Gusseted bag (W x D x L) | Metric | Mils stocked | Fits |
|---|---|---|---|
| 4 x 2 x 8 in | 10 x 5 x 20 cm | 1, 1.5, 2 | Bottles, rolled items |
| 4 x 2 x 12 in | 10 x 5 x 30 cm | 1, 1.5, 2 | Long narrow parts, bread |
| 5 x 3 x 12 in | 13 x 8 x 30 cm | 2 | Cylinders, cans |
| 5 x 4 x 15 in | 13 x 10 x 38 cm | 1 | Small bin liners, coffee bags |
| 6 x 3 x 12 in | 15 x 8 x 30 cm | 1 | Tall jars, tumblers |
| 6 x 3 x 15 in | 15 x 8 x 38 cm | 1, 1.5, 2 | Wine bottles, rolls |
| 6 x 4 x 15 in | 15 x 10 x 38 cm | 1, 1.5, 2, 3 | Quart containers, small boxes |
| 8 x 4 x 15 in | 20 x 10 x 38 cm | 1, 1.5, 2 | Tall small cartons |
| 8 x 4 x 18 in | 20 x 10 x 46 cm | 1, 1.5, 2, 4 | Pint and quart cartons stacked |
| 8 x 4 x 20 in | 20 x 10 x 51 cm | 2 | Long cartons, tubes |
| 10 x 4 x 20 in | 25 x 10 x 51 cm | 1, 2, 3 | Shoe boxes |
| 10 x 8 x 24 in | 25 x 20 x 61 cm | 1, 1.5, 2, 3, 4 | Small totes, product boxes |
| 12 x 8 x 24 in | 30 x 20 x 61 cm | 1, 1.5, 2, 3, 4, 6 | Totes, half-gallon cartons stacked |
| 12 x 8 x 30 in | 30 x 20 x 76 cm | 1, 1.5, 2, 3, 4 | Tall boxes, bin liners |
| 14 x 14 x 26 in | 36 x 36 x 66 cm | 2, 3 | Cube boxes up to 12 in |
| 16 x 14 x 36 in | 41 x 36 x 91 cm | 1.5, 2, 3, 4 | Drum liners, large cartons |
| 20 x 18 x 36 in | 51 x 46 x 91 cm | 1.5, 2, 3, 4 | Carton liners, bulk parts |
| 24 x 20 x 48 in | 61 x 51 x 122 cm | 1, 1.5, 2, 3, 4 | Bulk bin liners, large boxes |
Sizing examples
| Item | Measured item (W x L x thickness) | Estimated bag size (W x L) | Size to compare |
|---|---|---|---|
| Folded T-shirt | 8 x 10 x 1 | 10 x 13 (8 + 1 + 1; 10 + 1 + 2) | 10 x 13; confirm usable room at the closure |
| Hardcover book | 6 x 9 x 1.5 | 8.5 x 12.5 (6 + 1.5 + 1; 9 + 1.5 + 2) | 10 x 13; an 8 x 12 bag is smaller than this estimate |
| Folded bath towel | 14 x 10 x 3 | 18 x 15 (14 + 3 + 1; 10 + 3 + 2) | 18 x 24; check the filled bag before ordering |
Choosing between flat, reclosable and gusseted
- Flat bags are the cheapest per unit and seal on a heat sealer, tape, or a twist tie. Use them for anything that is packed once and not reopened.
- Reclosable (zipper) bags cost more per bag but need no sealer and are reopened by the customer. Standard for parts kits, samples, small retail items and anything with a white write-on block.
- Gusseted bags hold volume. Use them for cartons, bins, produce, bread, and any item thicker than about 3 inches where a flat bag would strain at the corners.
- Poly tubing is the answer for odd lengths: cut and seal both ends to make any bag length from one roll. See poly tubing.
Choose a small set of sizes from your measured products and packing trials. Excess space can let contents shift; a tight bag may strain the seams or leave too little room to close it. For the sister chart on mailers, see the mailer size chart; for boxes, the box size chart and box sizes in cm.
Shop poly bagsReclosable bags2 mil poly bags4 mil poly bags6 mil poly bags2 mil reclosable4 mil reclosable
Frequently asked questions
What size poly bag do I need for a T-shirt?
Measure the folded shirt, including its thickness. For an 8 x 10 x 1 inch shirt, the estimate in this guide gives a 10 x 13 inch starting size. Other folds, thicker garments and different closures may need more room. Check the filled bag before ordering in quantity.
How are poly bag sizes measured?
Flat bags are commonly listed as width x length, and gusseted bags as width x depth x length. Check the exact product's measurement convention, including whether dimensions exclude a zipper or closure. Thickness is listed separately in mil.
What is the most common poly bag size?
The right size depends on your measured contents, thickness and closure. Compare the chart with a packed sample; a size popular for one product may be unsuitable for another.
Should I size up a poly bag?
Include the item's thickness and room for the closure. The rectangular examples use width + thickness + 1 inch and length + thickness + 2 inches as a starting estimate. Check the selected bag's usable dimensions with your actual contents.
What poly bag size fits a 9 x 12 document?
A bag with the same nominal dimensions as the document may leave too little room for seams or closure. Compare a larger size, such as 10 x 13 inches for a thin 9 x 12 inch sheet, and confirm the usable dimensions of the exact bag.