Custom Cardboard Dividers for Boxes

Designed to Fit, Built to Protect

Perfect for eCommerce brands, retail packaging, food and beverage kits, cosmetics, candles, glassware, and more—our cardboard dividers balance structure, safety, and sleekness.

Strong Materials That Hold Up

We use high-quality, durable board materials that keep items securely in place through handling, stacking, and shipping.

• Corrugated cardboard – Lightweight yet ultra-protective
• Chipboard – Ideal for compact spaces and sleek finishes
• Kraft board – Natural, recyclable, and great for earthy branding
• SBS paperboard – Smooth surface for clean presentation
• Custom thicknesses – From thin partitions to heavy-duty walls

Styles for Every Box and Product

From fragile glass bottles to subscription kits, our dividers are precision-cut to keep products aligned and protected.

• Cross-style inserts for multi-item separation
• Grid-style dividers for complex product arrangements
• Layered trays with cut-outs for vertical stacking
• Foldable partitions for easy assembly
• Custom layouts for unique product shapes and sizes

Custom Printing for Brand Cohesion

Even functional packaging deserves style. Our dividers can be printed to match your brand’s aesthetics.

• Full-color CMYK or spot color options
• Branded messaging, care instructions, or product identifiers
• Matte, gloss, or soft-touch finishes
• Inside-print options for surprise branding moments

Add-On Features That Maximize Use

Upgrade your box interiors with thoughtful extras.

• Numbered sections for organization
• Scented or coated surfaces for enhanced appeal
• QR codes linking to product guides or unboxing videos
• Inserts with space for note cards, samples, or gifts

The 3Ps of Perfect Dividers

Presentation

Organized layouts enhance the unboxing experience and give products a professional look.

Preservation

Protects each item from scratching, smashing, or shifting during transit.

Protection

Designed to hold fragile and high-value items securely with precision-cut compartments.

Why 5000+ Brands Trust Custom Boxes Lab

We’ve helped businesses across every industry pack smarter with custom dividers built to last.

• No order minimums
• Fast U.S. production and shipping
• Eco-friendly material options
• Free design setup and dieline support
• Packaging specialists ready to assist anytime

Get a Free Quote Today

Simplify, organize, and protect your packaging with custom cardboard dividers.To get cost-effective packaging boxes without compromising on quality, you can contact us at (469) 649-8706 or email us sales@customboxeslab.com

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.