LettrLabs' 11" x 18" printed postcards are designed for bold visual storytelling and folded delivery. With a three-panel, trifold layout, they give you room to organize messaging into digestible sections. Whether you're explaining a product, announcing an event, or walking through a service workflow, this format gives your content structure and visual clarity. This guide covers everything you need to prepare your artwork — from exact dimensions to design-safe zones and postal requirements.
Typical use cases
Product showcases: feature products or services in each panel to tell a clear story.
Step-by-step guides: great for how-it-works walkthroughs or onboarding sequences.
Event promotions: share event info, speaker lineups, and include QR codes or RSVP links.
Menu or service list: ideal for restaurants, salons, or local contractors.
Direct-response offers: include a call-to-action panel with a coupon code or tear-off incentive.
Design dimensions
Design area | Dimensions | Notes |
Full bleed | 11.2" x 18.2" | Make sure your design extends to these edges for borderless printing. |
Final trim size | 11" x 18" | The finished size after cutting. |
Safe zone | 10.7" x 17.7" | Keep text/logos within this area to avoid cutting during trimming. |
Panel widths | Left: 6.05" / Center: 6.05" / Right: 5.9" | Allows proper folding without overlap or misalignment. |
Fold lines | At 6.05" and 12.1" | For accurate trifold folds. |
Address block | 2.62"H x 4.1"W (on back panel) | Must remain clear for postal info and stamp. |
Product specs
Fold type | Trifold (letter fold) |
Paper stock | Thick 100# card stock |
Printing | Ultra HD color on both sides |
Personalization | Optional merge fields for name, discount code, etc. |
Addressing and mailing | Address block + indicia required on back panel |
Quick reference
11" x 18" trifold printed postcard
Full bleed size: 11.2" x 18.2"
Trim zone: 11" x 18"
Safe zone: 10.7" x 17.7"
Have questions about setting up your design or making sure it meets mailing guidelines? Reach out to our team — we're happy to point you in the right direction.