Custom Square Envelopes

Designed To Be Bold & Balanced

We design square envelopes that reflect elegance and creativity — with clean edges, centered layouts, and the right proportions to highlight your message.

Material Options

Choose the texture and finish that fits your tone:

• Smooth white or colored paper – Clean and classic
• Kraft paper – Earthy and eco-friendly
• Linen or textured stock – Adds a luxury feel
• Recycled paper – Green and professional

Flexible Sizes

From small 5×5 envelopes to oversized square mailers, we customize the size to suit your content — invitations, booklets, or folded cards.

Sharp, Centered Printing

We use CMYK, digital, and offset printing for crisp text, balanced design, and vibrant color that holds up even on bold backgrounds.

Smart Functional Add-ons

Upgrade the look and utility of your square envelopes with:

• Peel & seal or gummed flaps
• Foil lining or custom interiors
• Embossed or debossed logos
• Printed return and address info
• Matching enclosure cards or inserts

Types of Square Envelopes

We create square envelopes for all occasions:

• Wedding and event invitations
• Greeting or holiday cards
• Announcement mailers
• Brand lookbooks or small brochures
• Promotional print campaigns

Built Around the 3Ps

Each envelope balances design and practicality:

• Presentation – Eye-catching, modern, and well-aligned
• Preservation – Protects enclosed material from wear
• Protection – Sturdy construction for mailing or hand delivery

Finishing Options

Add refinement with professional finishing choices:

• Gloss or matte coating
• Soft-touch lamination
• Foil stamping (gold, silver, rose gold)
• Spot UV accents
• Rounded corners or custom die-cuts

Why Choose Us?

We help you bring elegance and structure to your printed communication with square envelopes designed for standout impressions. You’ll get:

• Design assistance tailored to your needs
• Low minimum order quantities
• Quality materials and print consistency
• Quick production and delivery
• Sustainable stock options
• Nationwide shipping

Get A Quote

Ready to create square envelopes that are anything but ordinary?
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.