Introduction
A custom key card envelope is the flat, sealed paper envelope that holds a hotel key card, membership card, or gift card. Unlike a sleeve or holder, it is a true envelope — fully sealed on three sides, protecting the card during transit and delivering a premium unboxing moment when opened.
Hotels use key card envelopes for welcome packs, loyalty programs, and direct-mail promotions. This guide covers the flat envelope sizing, material choices, printing options, and wholesale ordering considerations for custom key card envelopes.
What a Key Card Envelope Is
A key card envelope is a flat mini-envelope sized to hold a standard CR80 card.
| Trait | Key Card Envelope |
|---|---|
| Structure | Sealed flat envelope |
| Card fit | CR80 card (85.6 × 54 mm) |
| Closure | Gummed or peel-and-seal flap |
| Use | Welcome packs, mailings, gifts |
Compared to other key card carriers:
| Form | Structure | Sealed? |
|---|---|---|
| Envelope | Flat, sealed | Yes |
| Sleeve | Open-ended wrap | No |
| Folder | Fold-over wallet | No |
CR80 Sizing
Key card envelopes are sized around the CR80 standard (ISO/IEC 7810 ID-1), the same dimensions as a credit card.
| Measurement | CR80 Card | Envelope Interior |
|---|---|---|
| Width | 85.60 mm | 88–92 mm |
| Height | 53.98 mm | 57–60 mm |
The envelope must be slightly larger than the card for a smooth fit:
| Fit | Dimension |
|---|---|
| Card (CR80) | 85.6 × 54 mm |
| Envelope (flat) | ~92 × 60 mm |
| Clearance | +2–4 mm around card |
Material Options
Key card envelopes are printed on paper stock suited to mailing and handling.
| Material | Weight | Trait |
|---|---|---|
| Uncoated paper | 80–100 lb text | Writeable, economical |
| Coated paper | 100 lb cover | Smooth, vivid print |
| Kraft | 80 lb text | Natural, eco look |
| Specialty (linen/textured) | 100 lb cover | Premium, tactile |
Choose material by the card’s purpose:
| Use | Material |
|---|---|
| Hotel welcome pack | Coated, branded |
| Membership mail | Uncoated (writeable) |
| Eco program | Kraft |
| Luxury gift | Specialty texture |
Printing Options
Key card envelopes print with the same methods as commercial envelopes.
| Detail | |
|---|---|
| Full-color (CMYK) | Brand imagery |
| 1–2 color logo | Economical |
| Foil stamping | Premium metallic |
| Emboss | Tactile mark |
For welcome packs and gifts, printing on the front panel delivers the strongest brand impression:
| Panel | Typical Content |
|---|---|
| Front | Logo, “Welcome” message |
| Flap | Small mark or blank |
| Back | Address, QR code |
Closure Styles
The flap closure affects assembly speed and security.
| Closure | Trait | Best For |
|---|---|---|
| Gummed | Moisture seal | High-volume automated |
| Peel-and-seal | Pressure seal | Manual, fast |
| String-and-button | Reusable | Premium, gift |
For mailings, peel-and-seal saves time; for keepsake welcome packs, a gummed flap reads more traditional.
Wholesale Ordering
Key card envelopes are ordered in volume by hotels and programs.
| Factor | Effect on Cost |
|---|---|
| Volume | Lower unit at scale |
| Material | Specialty costs more |
| Full-color adds | |
| Closure | Peel-and-seal slight premium |
Bulk ordering economics:
| Order Size | Method | Unit Trend |
|---|---|---|
| Hundreds | Digital | Higher |
| Thousands | Offset | Lower |
| Tens of thousands | Offset | Lowest |
Use Cases
Key card envelopes serve hospitality and membership scenarios.
| Use Case | Envelope Spec |
|---|---|
| Hotel welcome pack | Coated, branded, full-color |
| Loyalty membership | Uncoated, writeable |
| Gift card | Specialty, foil |
| Direct-mail promo | Lightweight, economical |
Two uses deserve note — hotel welcome packs use branded coated envelopes for a premium arrival, and membership programs use writeable uncoated stock for personal notes.
Conclusion
Custom key card envelopes are the sealed flat carriers that protect and present CR80 cards in welcome packs, mailings, and gifts. Size them slightly larger than the 85.6 × 54 mm card, choose material by use (coated for branding, uncoated for writing), and order in bulk to keep unit cost low. For the open sleeve and folder forms, see our key card holders page.
Need custom key card envelopes? Request a quote.