Understanding Envelope Terminology:
A Simple Guide from Envelopes.co.uk

Choosing the right envelope shouldn’t be complicated. Whether you’re sending invitations, invoices or samples, this simple guide from Envelopes.co.uk explains common terms, seal types, paper materials and handy packaging extras — so you can pick the perfect option with confidence.

📨 Understanding Envelope Terminology

Here at Envelopes.co.uk, we know the right envelope can make all the difference. We’ve put together this cheerful guide to help you crack the code of envelope lingo and find your perfect match.

✉️ Types of Envelope Seals

  • Peel & Seal – Just peel and press. Instant bond, no mess.
  • Gummed – Traditional seal activated with moisture; common for letters.
  • Self-Seal – Latex on the flap and body; press to close. Handy for quick runs.
  • Tuck Flap – No glue, no fuss. Simply tuck in to close.
  • String & Washer – A reusable wrap-around closure with vintage flair. Browse String & Washer
  • Butterfly – Push-through tabs that lock in place.
  • Pochette – Four flaps fold inwards in a swirl; origami meets stationery.

🔓 Envelope Terms

  • Banker – Diamond/V-shaped flap.
  • Pocket – Opens on the short side.
  • Wallet – Opens on the long side.
  • Rip – A tear-open strip for an easy, satisfying open.
  • Window – A panel that lets the address show through.
  • GSM – Paper weight in grams per square metre (g/m²); a key indicator of thickness and quality.

📄 Paper Types & Materials

  • Manilla – Semi-bleached, light brown; good printability.
  • Kraft – Strong, fibrous paper made from wood pulp.
  • Wove – Smooth, uniform finish; a popular everyday choice.
  • Glassine – Smooth and semi-transparent.
  • Opaque – Printed interior to prevent show-through.
  • Translucent (Vellum) – Nearly see-through for premium presentation.
  • Laid – Subtle lined texture for a classic look.
  • Hammer – Dimpled, tactile surface.

🌱 Eco-Friendly & Specialty Options

  • Board Back – Rigid back with “Please do not bend”.
  • All Board – Rigid on all sides for document protection.
  • Honeycomb Mailers – Paper-based cushioning; compostable and recyclable. See Honeycomb options
  • Flutelope – Corrugated paper padding instead of plastic bubbles.

📦 Other Packaging Products

  • Documents Enclosed – Clear pouches to display paperwork securely.
  • Jiffy / Padded Bags – Lightweight protection in transit.
  • Organza Bags – Elegant drawstring gift bags.
  • Pillow Boxes – Pop-up with interlocking tabs; retail-friendly.
  • Bubble Bags – Air-bubble lining for impact resistance.
  • Gusset / Box-Bottom – Expandable for bulkier contents.
  • Book Wraps – Snug, adjustable protection for books and more.
  • Grip-Seal Bags – Re-closable press-seal bags.
  • Crash Lock Boxes – Pre-glued base that auto-locks when opened.
  • Cellophane (OPP) Bags – Clear, flat presentation bags.

🎨 Customisation & Printing

Want something unique? We offer bespoke solutions tailored to your brand — plus fast digital printing from large C4s to tiny C7s.

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💌 Ready to Find Your Envelope Soulmate?

Browse our full range at Envelopes.co.uk and get in touch if you need a hand or fancy something custom.

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