Custom C6 Envelopes

Designed for Invitations, Cards, and Compact Documents

C6 envelopes (114 mm x 162 mm) are a popular choice for folded letters, thank-you notes, and custom prints. They offer a snug fit without excess space.

Perfect for both personal and professional use, C6s maintain a refined appearance while keeping your content secure and neat.

Materials

We use premium envelope paper designed for strength and print clarity:

• 80–100 gsm White Wove – Smooth and lightweight for everyday use
• Kraft Paper – Natural, recycled option for eco-conscious mailing
• Textured Linen or Felt Stock – Ideal for formal invitations
• Colored Papers – Add visual interest and brand identity

All materials are compatible with inkjet, laser, or offset printing.

Sizes

C6 is a fixed envelope size, but variations in construction are available:

• C6 standard with gummed flap
• C6 peel-and-seal or self-seal options
• C6 window or plain face depending on your needs

Custom inner printing or branded liners are also available for upgraded presentation.

Printing

Make your C6 envelopes stand out in the stack:

• Full-color or spot color printing
• Logos, return addresses, or custom artwork
• Front, back flap, and interior print areas

We use high-resolution, fade-resistant inks to maintain clarity and quality.

Add-ons

Enhance function and appeal with the following options:

• Foil stamping or embossing for luxury invitations
• Security tints for discreet mailing
• Envelope liners with patterns or branding
• Die-cut windows or custom flaps

These details add elegance and professionalism to your envelope presentation.

Types of C6 Envelopes

Commonly used across stationery, events, and marketing:

• Greeting Cards and Invitations
• Business Correspondence
• Nonprofit and Church Mailers
• Event RSVPs or Promotional Flyers
• Retail Product Inserts or Coupons

C6 envelopes are versatile for both high-volume mailings and personal connections.

3Ps of Small-Format Envelope Design

• Presentation
  Compact, clean, and well-printed envelopes show care in communication and attention to detail.
• Preservation
  Durable paper and tight seals protect your contents during mailing and handling.
• Protection
  Optional tints or thicker papers help maintain confidentiality and document integrity.

Go Premium with Elegant Finishes

Take your C6 envelopes to the next level with:

• Soft-touch matte or gloss coatings
• Custom envelope liners or colored flaps
• Matching stationery sets for full branding

Why Choose Custom Boxes Lab?

We specialize in C6 envelopes that combine visual appeal with mailing performance—ideal for personal notes, marketing, and formal communications.

• Free design and layout assistance
• Short-run or bulk printing options
• Eco-friendly papers and safe ink
• Fast production and national delivery
• Custom sizes and finishes available on request

Get a Quote Today

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.