Collection: Yellow Envelopes & Packaging

Yellow envelopes and packaging span pale lemon and butter yellow through to sunflower, golden yellow and deep amber. With over 15 products across over 25 sizes, the range covers spring and Easter campaigns, birthday cards, cheerful seasonal mailings, children's party invitations, optimism and energy-focused direct mail.

Yellow is the most visible colour in the postal spectrum under typical lighting conditions — it has the highest natural contrast against a letterbox interior and stands out immediately among other mail. Available at 30–250gsm paper weights with gummed and peel & seal closures.

Benefits of Yellow Envelopes

• over 15 products — spanning envelopes, packaging and accessories in pale lemon and butter yellow through to sunflower, golden yellow and deep amber.
• over 25 sizes — from small enclosures through to large document and packaging formats.
• Paper weights 30–250gsm — covering everyday and premium use cases.
• Closure options — gummed and peel & seal to suit personal and volume workflows.
• Royal Mail compatible — standard sizes qualify within Royal Mail weight and size limits.

Frequently Asked Questions

What are yellow envelopes used for?
Yellow envelopes are used for spring and Easter campaigns, birthday cards, children's party invitations, and any mailing where a high-energy, optimistic tone is required. Pale lemon and butter yellow suit softer occasions; sunflower and golden yellow suit high-impact campaigns and promotional mailings.

Are yellow envelopes Royal Mail compatible?
Yes — yellow envelopes in standard sizes are Royal Mail compatible within standard weight and thickness limits. Pale and mid-yellow allows direct address printing. Deep yellow and amber tones should be checked for address legibility — a white address label may be needed to meet Royal Mail contrast requirements.

What sizes do yellow envelopes come in?
The range covers over 25 sizes including standard formats: C7 (82 x 113mm), C6 (114 x 162mm), DL (110 x 220mm), C5 (162 x 229mm), C4 (229 x 324mm) and a range of square formats. Check individual product pages for the full size listing in yellow.