Four-side and Three-side Sealing Pouch: Comparison & Size/Capacity

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    Do you ever notice what is the packing way of the goods you purchase? This article explains two ways to pack goods: four-side sealing and three-side sealing. It includes definitions, features, suitable scenarios, and a comparison.

    Four-Side Sealing and Three-Side Sealing Comparison

    Four-side sealing and three-side sealing are two common ways of packaging goods. Four-side sealing means wrapping the goods with plastic film and sealing them on all four sides with heat. Three-side sealing means sealing on three sides and leaving one side open for loading the goods. You can see the difference from the photos.

    Four-side sealing
    Four-side sealing
    Three-side sealing
    Three-side sealing

    As you can see, the 3-side sealing Sachet is of the same shape as a 4-side sealing sachet. But the front and back panels are actually regionally sealed and then folded at one side for product filling. Generally, the bottom or edge side of the bag is folded which allows the pouch to flex and have products adjust to the correct position of the pouch.

    Characteristics of four-side sealing and three-side sealing

    They both own advantages and disadvantages, let’s take a look at their characteristics respectively.

    4 sided seal: Four-side sealing provides excellent sealing, protecting goods from pollution and damage. In addition, 4 side sealing pouch can provide a larger display area and a more beautiful presentation effect.

    3 side seal: 3-side sealing pouch has lower costs, offers easier storage and handling. Also, without the need for any tools, just rip it open by the tear notch.

    Applications of Four-side Sealing and Three-side Sealing

    However, different goods have different packaging requirements:

    Four-side sealing: Four-side sealing is great for products that need full protection, longer warranties, and brand displays, like high-quality electronics.
    These products normally must be kept away from moisture, dust, and other things which could spoil their performance or quality.
    Additionally, four-side sealing enhances the professional and high-quality appearance of products, boosting consumer trust in your company.

    Three-side sealing: Three-side sealing is commonly used for products that are easy to clean and have short lifespans or low packaging requirements. These products include everyday items and food, such as ketchup, small snacks, facial masks.
    These products usually do not need too many protection measures; most likely, they have an outer box to keep them safe. As long as they can keep their cleanliness and hygiene.
    Also, this seal packaging method helps consumers easily open and use products, increasing their satisfaction and effectiveness.


    Now, we will compare the size/capacity of packaging for four-side sealing and three-side sealing by using a table.

    Three-side Sealing Size & Volume

    Length (mm) Width (mm) Capacity (c.c.)
    80 60 9
    95 70 20
    110 80 31
    125 90 50
    140 100 62
    155 110 76
    170 120 90
    185 130 180
    200 140 240
    215 150 330
    230 160 470

    Four-side Sealing Size & Volume

    Length (mm) Width (mm) Capacity (c.c.)
    80 60 8
    95 70 16
    110 80 25
    125 90 36
    140 100 52
    155 110 70
    170 120 80
    185 130 150
    200 140 210
    230 160 250
    230 160 380


    After compare the size and volume from these two tables, we are going to talk about the Benefits of them.

    Benefits of 3 Side Seal Bags:

    • 3 Side Seal bags are a cheap and practical option for packaging, using materials efficiently and working well.
    • These bags are larger volume in size and can hold more compared to the 4 side seal bags. Therefore, they are suitable for accommodating larger items.
    • Uniform shape of 3 Side Seal bags makes cartoning neat and consistent, improving shelf appearance.
    • Consumer convenience: We can easily incorporate a tear notch feature to simplify product access, enhancing the user experience.
    • Fast packaging: 3 Side Seal Bags work well with high-speed equipment, making manufacturing efficient.
    • Design allows for efficient storage and transport, consuming less space than rigid formats.

    Benefits of Rectangular 4 Side Sealing Bags:

    • Different sizes available to accommodate different product volumes and meet various consumer needs.
    • Structural integrity: The straight edges and angles provide robustness, offering protection for products during transit and handling.
    • Efficient automation: The consistent dimensions facilitate automation in packaging lines with greater precision and less waste.
    • Presentation enhancement: The rectangular form facilitates effortless stacking and showcasing, enhancing shelf visibility and attracting customers.

    Common Applications

    • Grounded goods / Powder
    • Healthcare
    • Supplements
    • Homecare products
    • Meal
    • Drip Coffee Sachet
    • Snacks
    • Frozen food
    • Pet treat
    • Nuts


    • Easy-open tear notches
    • Press-to-seal closures
    • Smooth-edged corners
    • Visible product viewing window
    • Convenient hanger hole

    What is a Gusseted Bag?

    What Does Gusset Mean in a Packaging Bag? A gusset in a bag refers to an extra piece of material added to the sides or bottom, which allows the bag to expand and hold more items. Understanding Gusseted Bags A gusseted bag is a versatile packaging solution with added material on its sides or bottom, allowing this type of pouch to

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