Paper Bag Sizing, GSM & Container Loading Guide: 20ft & 40ft Capacity Calculator

The Engineering Behind Paper Bag Procurement

When sourcing paper bags in container volumes, precision in dimensions, paper weight (GSM), and container load optimization directly impacts freight cost per unit. This reference guide provides technical metrics used by global procurement managers to calculate specifications.

1. How to Specify Bag Dimensions Accurately

In international manufacturing, three dimensions define a paper bag:

• Width (Face): The horizontal front width of the bag opening.
• Gusset (Depth): The side fold width that expands to create volume.
• Height: The vertical length from the bottom base to the top rim.

Formula standard: Width (W) × Gusset (G) × Height (H) in millimeters (mm).

2. GSM vs. Weight Carrying Capacity Matrix

Paper Weight (GSM)	Burst Factor (BF)	Safe Load Capacity	Typical Application
50 – 60 GSM	18 – 22 BF	0.5 kg – 1.5 kg	Bakery croissants, prescription pharmacy pouches, confectionery.
70 – 80 GSM	22 – 26 BF	2.0 kg – 5.0 kg	Standard fast-food takeaway, burger boxes, convenience grocery.
90 – 110 GSM	26 – 32 BF	6.0 kg – 10.0 kg	Supermarket grocery checkout, heavier delivery orders, apparel retail.
120 – 140 GSM	30 – 35+ BF	10.0 kg – 15.0 kg	Luxury boutique shopping, heavy department store retail, shoe boxes.

3. Ocean Container Capacity Estimates (20ft vs. 40ft HC)

Bag Type & Sample Dimensions	Carton Pack	Approx. 20ft Container (28 CBM)	Approx. 40ft High Cube (68 CBM)
Small SOS: 150 × 90 × 270 mm	1,000 pcs	350,000 – 400,000 pcs	750,000 – 850,000 pcs
Medium SOS (Takeaway): 260 × 140 × 320 mm	500 pcs	180,000 – 220,000 pcs	400,000 – 480,000 pcs
Large Grocery SOS: 320 × 170 × 420 mm	250 pcs	110,000 – 140,000 pcs	240,000 – 290,000 pcs
Retail Shopping (Handle): 300 × 120 × 400 mm	250 pcs	90,000 – 120,000 pcs	200,000 – 250,000 pcs