When packing goods into cartons, many units will use an extra layer of plastic bags to increase product protection. Calculating the right size of plastic bags for the product is very important because they help to keep the product’s appearance neat and eye-catching and will help save costs for businesses when using the right amount.

Where to buy plastic bags lined with cartons or product boxes?

Normally, we will buy all kinds of plastic bags available on the market at stores, agents selling plastic bags, … or wholesale markets in the city. However, these bags are mass-produced, so the bag size and thickness may not match the size of the product.

Understanding this, Bao Ma packaging chooses a production method according to customer requirements in terms of size and material. Bao Ma’s plastic bags lined with cartons/product boxes and plastic bags for products will be suitable for production units that need a large amount of plastic bags, especially those with export goods. We guarantee to provide good quality and aesthetic plastic bags according to your size, thickness and requirements.

Read more: Plastic packaging helps preserve food for a long time

How to calculate the size of plastic bags lined with cartons or product boxes?

To get plastic bags to wrap your products optimally and save money, please refer to the calculation method below.

To line the plastic packaging inside the carton, and carton box to achieve the highest aesthetic, we can use 2 types of bags: flat bags and hip bags.

Flat bag calculation formula

Round container

Round container sizes for flat bags can be found using the Circumference(C), Diameter(D), and Height(H) of the container. Example: Let’s assume the container Height(H) is 64cm and the Diameter(D) is 30cm.
Step 1:
Circumference(C)= Diameter(D) x 3.14
30 (D) x 3,14 = 94cm(C)
Step 2:
The width of the Bag is found by Dividing 37″(C) by 2 and adding 1″ for a looser fit.
94cm/ 2 = 47cm + 3cm= 50cm
Step 3:
Length of Bag= Height(H) + Diameter(D) + 12-13cm for overhang.
(H) 64cm+ (D) 30cm + 13cm= 107cm
The bag Size Needed is 50cm x 107cm

Square container

Square container sizes for flat bags can be found using Width(W), Depth(D), and Height(H). Depth is considered the shorter of the 2 sides.
Step 1:
Width of Bag Needed: Width(W) + Depth(D) + 5cn for a looser fit.
Step 2:
Length of Bag Needed: Height(H) + 1/2 of Depth(D) + 12-13cm for overhang.

If container size is 36cm (W) x 25cm (D) x 81cm(H), the formula would be:

Step 1:
36cm (W) + 25cm (D) + 5cm= 66cm Wide

Step 2:
81cm (H) + 12.5cm (1/2 của (D)) + 13cm= 107cm Long

Bag size needed is 66cm x 107cm

The formula for calculating the hip bag

Gusseted Pallet Covers

In order to determine the bag size needed, one must measure the width(W), Depth(D), and Length(L).
Step 1:
Width(W) of the Cover = Width(W) of the pallet + 3cm-5cm.
Step 2:
Depth(D) of the Cover = Depth(D) of the pallet + 3cm-5cm
Step 3:
Length(L) of the Cover = Height(H) of the pallet + 1/2 the Depth(D)
If pallet size is 102cm(W) x 91cm (D) x 127cm(H),
cover dimensions are 107cm x 96cm x 173cm

Gusseted Box Liners

Sizes for Box Liners can be found using Width(W), Depth(D), and Height(H). The following steps allow you to determine the correct size.
Step 1:
Width(W) of the bag = Width(W) of the Box + 2cm-3cm.
Step 2:
Depth(D) of the bag = Depth(D) of the Box + 2cm-3cm.
Step 3:
Length(L) of the bag = Height(H) of the Box + Depth(D) of the Box + 15cm to cover contents.
If the Box size is 46cm (W) x 30cm (D) x 36cm(H), then the bag dimensions needed are:
49cm (Rộng) x 33cm (D) x 81cm (L).

Why choose us?

Bao Ma Production & Trading Co Ltd is complying with ISO 9001-2008 which ensures the quality control system and the ability to produce different materials and sizes of poly bags and rolls, including:

  • Packing products for agricultural, aquatic, food consumption, and industrial purposes.
  • Zip-lock bag, shopping bag, garbage bag, plastic carriers.
  • Plastic sheeting
  • Perforated plastic roll
  • Poly roll of 2m – 4m measurement for the use of lining prawn-raising ponds, for construction sites and sewage system usage, and as cover sheets for agricultural and industrial purposes.
  • Printing services on packages of up to 6 colours with customization
  • Trading various plastic raw materials such as PP, HDPE, LDPE, LLDPE…

So, please contact us via hotline: 0963 16 11 55 – 0903 814 184 and let us be honoured to serve you in the best way possible.


Address: No. 21 Tan Tao Industrial Park, Road No. 3, Tan Tao A Ward, Binh Tan District, HCMC


  • Ms Kim Tuyen: 0963.16.11.55 (Vietnamese)
  • Mrs HelenLy: 0903.814.184 (English – Chinese)

Email: info@poma.com.vn

Website: www.poma.com.vn

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