Full-Colour Personalised Self Seal Envelopes

Keep your outgoing mail professional, secure, and on-brand with our custom printed self seal envelopes. Designed for speed and convenience, these peel-and-seal envelopes remove the need for licking or moistening - making them a time-saving essential for busy offices, e-commerce dispatch, marketing mailouts, and everyday business post.

• Vibrant full-colour print: Add your logo, branding or artwork in crisp digital colour to make every envelope instantly recognisable.
• 5-star rated quality: Trusted by businesses for sharp print, clean presentation and dependable envelope performance.
• Printed proof & 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 turnaround: Printed and delivered in as little as a few days - ideal for time-sensitive campaigns or stationery restocks.
• UK made & printed: Manufactured and printed in the UK for consistent quality and reduced transport miles.
• PEFC certified paper: Produced using PEFC-accredited paper with 60%–90% recycled content for a more responsible packaging choice.
• Letterbox & postage friendly: Sized to meet Royal Mail standards and fit through standard letterboxes, helping reduce missed deliveries and avoid unnecessary postage costs.
• Clear size guidance: Envelope sizes shown are internal dimensions listed as Height x Length.

Window Sizes & Placement

• DL self seal envelope: Window size 35x90mm. Placement 19mm from left, 18mm from bottom.
• C5 self seal envelope: Window size 45x90mm. Placement 20mm from left, 60mm from bottom.
• C4 self seal envelope: Window size 40x105mm. Placement 24mm from left, 213mm from bottom.

Considering a printed sample?

We offer an optional printed sample so you can confirm colour quality, print sharpness and suitability before ordering in larger quantities. When you proceed with a full order of the same design, we will refund the cost of the sample.

Please note: Minor branding or barcodes may appear on the self seal envelope. Images shown are for guidance only and the supplied product may differ slightly.

Due to manufacturing tolerances, actual item dimensions may vary by 10–20mm. If sizing accuracy is essential, we recommend ordering a sample before placing a larger order.

Authentic Product Photography

All images displayed on Parcelsend UK represent genuine printed jobs we have produced. No visuals on this page are created or enhanced using AI - every photograph is taken from real customer orders to give you an honest representation of print quality and finish.

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 manufactured and dispatched 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. Delivery is calculated at checkout based on order value - free over £70. All orders are shipped flat-packed for maximum efficiency.

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.