Cardboard Inserts
Want your packaging to hold more than just products—like professionalism, precision, and protection? Whether you’re shipping glass bottles, cosmetics, electronics, or delicate gifts, custom cardboard inserts keep your items secure, organized, and beautifully presented. At Custom Boxes Lab, we craft cardboard inserts that not only protect but also elevate your unboxing experience. So buy custom cardboard inserts from Custom Boxes Lab. Because what’s inside should always arrive just as you intended.
Availability: In Stock

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Designed for Stability, Styled for Your Brand
Ideal for eCommerce brands, subscription boxes, retail kits, and product bundles—our inserts combine secure structure with branded style to enhance both function and first impressions.
Durable Materials That Hold Their Shape
We use only sturdy, sustainable boards that maintain structure through storage, shipping, and shelf time.
- Corrugated cardboard – Lightweight yet durable with superior shock absorption
- Kraft board – Eco-friendly and perfect for rustic or minimalist brands
- Chipboard – Sleek and compact for tight packaging spaces
- SBS paperboard – Smooth finish for clean presentation
- Multiple thickness options – Tailored to your product weight and fragility
Custom Styles for Every Application
Whether you need compartments, separators, or cushioning, our cardboard inserts are custom-cut to match your exact product layout.
- Multi-section grid inserts for product kits
- Die-cut shapes for bottles, jars, gadgets, or candles
- Layered inserts for stacking components or gifts
- Foldable or slotted partitions for flexible configurations
- Compartment boxes with removable trays
Branded and Functional Printing
Turn even the inside of your box into a branding opportunity.
- Full-color or spot color printing
- Branded logos, product labels, or setup instructions
- Inside-print options for storytelling or surprise messages
- Coating options: matte, gloss, or soft-touch
Add-On Features That Go the Extra Mile
Enhance the experience with smart, thoughtful extras.
- QR codes linking to tutorials, care instructions, or offers
- Numbered compartments for kits or samplers
- Printed scent notes, thank-you messages, or guides
- Pair with tissue, foam, or product cards for a luxury feel
The 3Ps of Perfect Inserts
Presentation
Gives your product a clean, premium layout and a polished unboxing experience.
Preservation
Holds products securely in place to avoid shifting, scratching, or damage.
Protection
Engineered to cushion even the most fragile items in transit or on retail shelves.
Why 5000+ Brands Choose Custom Boxes Lab
From small startups to global brands, businesses trust us for inserts that work as hard as the products they protect.
- No order minimums
- Fast production and U.S. shipping
- Eco-conscious materials and printing
- Free design setup and dieline support
- Packaging experts ready to assist anytime
Get a Free Quote Today
Need inserts that keep your products protected and perfectly placed? Call 0000 or email us now to get started on custom cardboard inserts with Custom Boxes Lab.
Dimensions | All Custom Boxes & Shapes, Paper Bags, Mylar Bags, Tube Packaging |
Availability | InStock |
Printing | No Printing, CMYK, CMYK + 1 PMS Color, CMYK + 2 PMS Colors |
Paper Stock | 10pt to 28pt (60lb to 400lb) Eco-Friendly Kraft, E flute Corrugated, Bux Board, Cardstock, Mylar, Paper Bag Stock, Tube Paper, Bespoke Packaging Materials |
Quantities | No Minimum Order Required |
Coating | Gloss, Matte, Spot UV, Holographic Foiling, Gold Foiling, Embossing, Silver Foiling, Debossing |
Default Process | Die Cutting, Gluing, Scoring, Perforation |
Options | Custom Window Cut Out, Gold/Silver Foiling, Embossing, Raised Ink, PVC Sheet, Bespoke Die-Cuts |
Proof | Flat View, 3D Mock-up, Physical Sampling (On request) |
Turn Around Time | 7-10 Business Days, Rush Available |
When measuring a custom box, there are a few technical specifications that must be considered to ensure proper design, manufacturing, and fit for the product. Here are the major technical things to measure a custom box:
Inside Dimensions (Critical for Product Fit)
- Length (L): The longest side of the box measured inside from one corner to the opposite corner.
- Width (W): The shorter side of the box measured inside perpendicular to the length.
- Depth/Height (D or H): Measured inside from the bottom to the top opening of the box. Always specify that dimensions are given in Length × Width × Height.
Outside Dimensions (Important for Shipping & Storage)
- Measure the outer surfaces of the box including material thickness.
- Outside measurements are used for pallet stacking, warehouse spacing, and shipping compliance.
Material Thickness (Board Caliper)
- The thickness of the packaging material (e.g., corrugated board, rigid stock, cardstock).
- Impacts both the internal usable space and external dimensions.
Flap Measurements
- For boxes with flaps (e.g., mailer or shipping boxes), measure:
- Inner flaps: Ensure they meet in the middle without overlapping too much.
- Outer flaps: Allow proper sealing without gaps.
Tolerances
- Account for manufacturing tolerances (usually ±1/16" or ±2mm depending on material).
- Ensure the product fits without being too tight or loose.
Volume Capacity
- Calculate internal cubic capacity (L × W × H).
- Helps in determining how much space the product will occupy and shipping efficiency.
Product Orientation
- Decide how the product sits inside the box and measure accordingly.
- Orientation affects whether length or width is the primary dimension.
Die-Cut Openings or Windows
- Measure exact placement, height, and width for any cutouts.
- Ensure structural integrity when adding windows.
Printing Bleed & Safe Zones
- Include measurements for:
- Bleed area: Extra space beyond the cut line for printing.
- Safe zone: Inner area where critical text or logos should be placed.
Closure Type & Locking Tabs
- Measure slots, tabs, or locks for boxes with custom closures.
- Precision is required to avoid misalignment during assembly.
Packaging Style
- Folds, creases, and scores must be measured for accurate dieline creation.
- Different styles (e.g., RSC, tuck-end, mailer, sleeve) require specific panel measurements.
Delivering Premium Packaging. Materials Tailored for Your Brand and Product.

Cardboard
Giving cardboard material option to give versatility and durability to your box, widely used in many industries.

Kraft
Offering eco-friendly kraft material for your product with the least environmental impact and minimizing waste.

Rigid
Offering you premium rigid boxes, perfect for luxury packaging and high-end presentation.

Corrugated
Custom Boxes Lab specializes in strong, reliable corrugated boxes ideal for shipping and storage.