Calculating the total shipping volume in cubic meters (CBM) for bulk eyewear orders such as 5,000 pairs of men's sunglasses is essential for accurate freight estimation and supply chain planning. By understanding master box dimensions, packing density, and freight conversion metrics, importers can prevent unexpected logistics costs.
To determine the overall volume, first calculate single master box dimensions: 0.50m × 0.40m × 0.30m = 0.060 CBM. For a standard order of 5,000 pairs packed at 100 units per master box, you will require 50 cartons, resulting in a total base volume of 3.0 CBM.
However, specialized designs like double-bridge retro models or metal pilot frames with hard protective cases demand more space. If packing density drops to 80 or 50 pairs per box, the total carton count increases to 63 or 100 boxes, adjusting the final cargo volume to 3.78 CBM or 6.0 CBM respectively.

| Shipping Mode | Recommended Volume | Billing Foundation | Estimated Transit Time | Payment Options |
|---|---|---|---|---|
| Ocean Freight | Ideal for orders ≥ 2.0 CBM (LCL / FCL) | Actual Volume (CBM) / Revenue Ton | 20 – 40 Days | Corporate Wire / Bank Transfer |
| Air Freight | Express shipments ≤ 5.0 CBM | Volumetric Weight Ratio (1 CBM = 167 kg) | 3 – 7 Days | Corporate Wire / Bank Transfer |
| Overland Transport | Regional & cross-border freight | Gross Volume to Weight ratio | 5 – 15 Days | Corporate Wire / Bank Transfer |
How many sunglasses fit inside one standard master carton?
Typically, 100 to 200 pairs fit into a single carton when packed in individual polybags. If hard clam-shell cases are used, capacity reduces to 50–80 pairs per box.
What is the air freight volumetric weight for 3.0 CBM of sunglasses?
At the standard air cargo ratio of 1 CBM = 167 kg, a shipment measuring 3.0 CBM translates to roughly 501 kg of billable weight.
Does palletizing increase total CBM volume?
Yes. Palletizing 50 master cartons adds around 10% to 15% additional volume due to pallet bases, corner guards, and wrapping clearance.
Precise volume estimation relies on confirming outer packaging specs before mass production finishes. Partnering with experienced suppliers ensures seamless shipping workflow. Yiwu Green Shine Arts & Crafts Co., Ltd supports comprehensive international logistics. For technical guidance, contact leoxiao@cngreenshine.com.
Founded in 2016, Yiwu Green Shine Arts & Crafts Co., Ltd operates with a dedicated team of 10 professionals focused on producing quality optical frames, reading glasses, fashion eyewear, and sunglasses. Exporting 90% of total production to key markets including the United States, Germany, Spain, Australia, Italy, France, and Ireland, the company manufactures over 3 million pairs annually with full OEM/ODM capabilities.

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