Flat Greeting Card
Looking for a simple, stylish way to deliver a personal or professional message? At Custom Boxes Lab, we create flat greeting cards that are elegant, easy to mail, and fully customizable for any occasion. Whether you’re sending holiday wishes, business thank-you notes, or event invitations, these single-panel cards offer a clean, modern presentation. So, buy flat greeting cards from Custom Boxes Lab to make every message stand out—without the fold.
Availability: In Stock

Get Instant Quote
Designed for Style and Simplicity
Flat greeting cards are perfect for announcements, postcards, or personal sentiments. Their clean layout offers ample space for design, text, and custom embellishments.
Materials
We offer premium paper options to match your design and feel:
- Matte Cardstock – Smooth, non-reflective, and easy to write on
- Glossy Coated Stock – Sharp colors and a sleek finish for printed designs
- Textured Linen or Felt Paper – Adds tactile elegance and depth
- Recycled Stock – Sustainable and earthy with quality performance
Sizes
Choose from popular standards or request a custom cut:
- 4″x6″ or 5″x7″ for classic greeting card dimensions
- Square or panoramic formats for modern appeal
- Custom sizes available to match your envelope or mailing style
Printing
Bring your message to life with vibrant, high-resolution printing:
- Full-color front and optional back design
- Personalized messages, logos, or illustrations
- Edge-to-edge printing with perfect alignment
We use fade-resistant, eco-friendly inks for lasting quality and sharp detail.
Add-ons
Elevate your flat card with finishing touches and packaging options:
- Foil stamping or embossing for highlights
- Spot UV on text or graphics
- Rounded corners for a softer look
- Matching envelopes with custom lining or sealing stickers
Types of Flat Greeting Cards
Suitable for personal, promotional, and corporate uses:
- Holiday Cards and Seasonal Greetings
- Thank-You or Appreciation Notes
- Event Invitations or RSVP Cards
- Brand Announcements or Product Launch Inserts
- Postcard Mailers with a Premium Touch
3Ps of Greeting Card Printing Approach
- Presentation
A single flat panel creates a bold, focused message that’s easy to display, frame, or pin—perfect for simple elegance. - Preservation
Printed on sturdy cardstocks that resist bending and fading, ensuring your card remains presentable from mail to memory. - Protection
Optional envelopes, coatings, and packaging help safeguard your cards in transit and add to the overall presentation.
Go Premium with Card Enhancements
Upgrade the look and feel of your flat greeting cards with premium options:
- Soft-touch coating for a luxurious texture
- Gold, silver, or holographic foil accents
- Die-cut shapes or borders for a creative twist
Why Choose Custom Boxes Lab?
We specialize in flat greeting cards that are simple to send and powerful to receive. Whether for business or personal use, we print cards that leave a lasting impression.
- Free design assistance and templates
- Low minimums and bulk pricing
- Fast production and turnaround
- High-quality materials and finishes
- Nationwide delivery with tracking
- Expert support from print professionals
Get a Quote Today
Want a flat card that says it all—beautifully and professionally? Call us at 0000 or email us now to create your custom flat greeting card that’s ready to impress.
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.