Personalised Full-Colour Self Seal Envelopes

Professional, practical, and printed to perfection - our custom self seal envelopes are a time-saving essential for businesses that want their post to look sharp and stay secure.

• 5 Star Rated ⭐⭐⭐⭐⭐
• Full Colour Digital Print - Make your brand instantly recognisable with your full-colour logo or design. 🎨
• Total Satisfaction Guarantee 🤗 - Approve a full printed sample of your self seal envelope before we go into full production.*
  *Please note this excludes printed single sample orders.
• Fast Delivery Promise - Printed and delivered in as little as a few days. 🚛
• Locally Manufactured and Printed - All our self seal envelopes 🛍️ are both manufactured and printed in the heart of the UK further reducing our carbon foot print.🌿
• PEFC Certified Materials - Made from PEFC-accredited paper with 60%–90% recycled content. 🌲
• Letterbox & Postage Friendly - Designed to meet Royal Mail sizing standards and fit through standard letterboxes - no missed deliveries, no added costs. ✅
• Self seal envelope sizes shown are the internal dimensions: Height x Length.
• Window Sizes & Placement:
• DL Envelope Window size: 35mm x 90mm. Placement: 19mm from left, 18mm from bottom.
• C5 Envelope Window size: 45mm x 90mm. Placement: 20mm from left, 60mm from bottom.
• C4 Envelope Window size: 40mm x 105mm. Placement: 24mm from left, 213mm from bottom.

💡 Want to double-check print quality or fit?

Order a full-colour printed self seal envelope sample, and we’ll refund the sample fee if you place a full order with the same design. Please note that an approval proof is not sent when ordering a single sample.

Please note: branding/barcodes may appear on parts of the self seal envelopes. Images are for reference purposes only and there may be slight variances to the product supplied.

Due to manufacturer tolerances, actual item dimensions may vary by 10–20mm. If precise sizing is important for your project, we strongly recommend requesting a sample before placing your order.

Genuine Imagery of Customer Jobs*

*At Fast Printed Packaging, we take pride in ensuring that all imagery, designs, and artwork displayed across our website are 100% legitimate orders we have produced for real customers. Every product image and artwork is authentic, created by our designers, and represents genuine customer orders. Nothing shown on our website has been generated or altered by Artificial Intelligence (AI). All imagery reflects the true quality and accuracy of what you will receive.

Because we use an on-demand, instant digital full-colour print system, we’re able to offer some of the lowest minimum order quantities in the UK - perfect for small runs or custom projects.

Please note: a one-time low-volume set-up fee of £49.95 applies to any order under £100. This is added automatically at checkout, but it won’t apply to repeat orders of the same product as long as the artwork remains unchanged.

All of our products are printed right here in our own UK warehouse, which means we can offer some of the fastest turnaround times in the country. And because everything is produced in the UK (unlike many other providers), you’ll never have to worry about customs delays or surprise charges.

100% Risk-Free Satisfaction Guarantee - We want you to feel totally confident when ordering with us. Before full production starts, you’ll get a proof (by app or email) and can make as many changes as you need until you’re completely happy. If you’d like to check our quality first, you can order a sample directly from the product page. Proofs aren’t provided with samples since they’re just for testing print and quality, but when you place your full order, you’ll be able to make amendments then. The cost of your sample will be refunded against your first full order*, and if you’re not happy with the quality, we’ll refund you in full.

*Sample refunds can’t be combined with other discounts or promotions.