Packaging Resources
Find the Right Poly Bag for Your Needs
Learn how poly bags are measured and use our free calculator to find the perfect size for your product.
Quick Guide
How to Measure Poly Bags
Key rule: Poly bags are always measured flat — not inflated. Width across the opening, length from opening to sealed bottom.
Width
Across the open end, edge to edge
Length
Opening down to bottom seal
Gauge
Thickness in mils (0.001")
Measuring Steps
1
Lay flat on a hard surface — smooth out all air pockets
2
Measure width straight across the open end, edge to edge
3
Measure length from opening to the bottom seal — include the seal
4
Note the gauge — light items: 1–2 mil; heavy/sharp: 4–6 mil
5
Record as Width × Length × Gauge e.g. 10" × 14" × 2 mil
Sizing for a new product?
Add 1–2" to your product's width and 3–4" to its length to allow for easy loading and a proper heat seal.
Free Tool
Bag Size Calculator
Enter your product dimensions and get an instant recommended poly bag size, including proper clearance for sealing.
Recommended Bag Size
10" × 14"
Width: 8" product + 2" clearance = 10"
Length: 10" + 2" depth + 4" seal = 14"
Suggested gauge: 2 mil
Length: 10" + 2" depth + 4" seal = 14"
Suggested gauge: 2 mil
Gauge Quick Reference
Light items1–2 mil
Hardware / parts3–4 mil
Apparel / retail2 mil
Sharp / metal6 mil
Electronics3–4 mil
Industrial8–10 mil