Flat Invitation Box
Deliver your invitations with refined elegance using our Flat Invitation Boxes—crafted for premium presentation without the bulk. Ideal for weddings, galas, VIP events, product launches, or luxury brand mailings, these boxes provide a secure, stylish home for flat cards, layered stationery, or inserts. Slim and elegant, they make every invite feel like a high-end experience.
Availability: In Stock

Get Instant Quote
Key Features
- Ultra-Slim Profile – Designed specifically for flat 5×7 or A7 invitation cards
- Rigid Construction – Made from strong chipboard or luxury paperboard for durability
- Minimalist Design – Clean lines and a smooth finish for modern appeal
- Envelope Alternative – Protects your invitation from bending, creasing, or postal damage
- Optional Magnetic or Tuck Closure – Secures contents in a subtle, sophisticated way
Customization Options
- Full-color exterior printing or classic monochrome tones
- Embossed or debossed logos, names, or monograms
- Foil stamping in gold, silver, rose gold, or custom colors
- Matte, soft-touch, or velvet-touch finishes available
- Inside printing for RSVP details, QR codes, or personal messages
- Optional satin ribbon wrap or wax seal stickers
Perfect For
- Luxury wedding invitations
- Corporate event or gala invites
- VIP brand mailers or influencer kits
- Save-the-date announcements
- Birth or milestone celebration invites
Why Choose a Flat Invitation Box?
Because your event deserves more than a plain envelope. Flat invitation boxes provide elegance, protection, and a tactile experience that sets the tone for everything that follows.
Simplicity meets sophistication.
Choose a Flat Invitation Box to deliver your special moments with the polish and presence they deserve.
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.