Products
- Kraft Envelopes
- Special Offers
- Printed Envelopes
- Printed Packaging
- Sample Swatches
- Wedding Envelopes
- Wedding Stationery
- Wedding Table Planners
- Embossed Envelope Seals
- Square Envelopes
- Peel & Seal Envelopes
- C4 (229 x 324 mm) Envelopes
- C5 (162 x 229 mm) Envelopes
- C6 (114 x 162 mm) Envelopes
- C7 (83 x 112 mm) Envelopes
- DL (110 x 220 mm) Envelopes
- i1 (60 x 90 mm) Envelopes
- i2 (70 x 100 mm) Envelopes
- i3 (80 x 215 mm) Envelopes
- i4 (89 x 183 mm) Envelopes
- i5 (95 x 122 mm) Envelopes
- i6 (125 x 175 mm) Envelopes
- i7 (115 x 315 mm) Envelopes
- i8 (133 x 184 mm) Envelopes
- i9 (152 x 216 mm) Envelopes
- Seasonal Envelopes
- Recycled Envelopes
- Coloured Envelopes
- String & Washer Envelopes
- Card Blanks & Envelopes
- Pearlescent Envelopes
- Metallic Envelopes
- Business Envelopes
- Gusset Envelopes
- Board Envelopes
- Bubble Bags
- Jiffy Padded Envelopes
- Polypropylene Sleeve Bags
- Headed Poly Sleeve Bags
- Mount Boards & Bags
- Postal Packaging
- Plastic Storage Boxes
- Adhesive Products
- Smooth & Textured Card/Paper
- Small Envelopes
- Calendar Envelopes
- Clariana Envelopes
- Back to School
- Bulk Envelopes
- Glassine Envelopes
Envelope Size Guide
Our envelope size guide demonstrates the standard envelope sizes in the UK and the size of the paper they accommodate.
What size is a C4 envelope?
C4 envelopes are 229 x 324 mm in size and a A4 card blank can fit inside or an A3 card blank folded in half. These C4 envelopes are ideal for sending A4 documents or certificates.
What size is a C5 envelope?
C5 envelopes are 162 x 229 mm in size and fit an A5 card blank or A4 card blank folded in half. These C5 envelopes are also known as A5 envelopes and are ideal for sending larger greetings cards.
What size is a C6 envelope?
C6 envelopes are 114 x 162 mm in size and will fit an A5 card blank folded once or an A4 card blank folded four times. These C6 envelopes perfect for greetings cards or any occasion.
What size is a C7 envelope?
Standard C7 envelopes are sized 83 x 112 mm to fit A7 paper or A5 paper folded four times. These are small envelopes and are popular as use for RSVP or thank you cards.
What size is a DL envelope?
Traditional sized DL envelopes are 110 x 220 mm and fit an A4 card blank folded twice or an A5 card blank folded once. These DL envelopes are a popular sized envelope and are ideal for all occasions.
What size is a 5 x 7 envelope?
5 x 7" envelopes are traditional sized envelopes and are a very popular size for greetings cards and invitations. 133 x 184 mm envelopes will fit a 5 x 7" card blank.
Gummed EnvelopesGummed envelopes require to be wetted with liquid in order to be stuck down. These are the traditional envelopes and are very popular. 
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Peel and Seal EnvelopesPeel and seal envelopes have a sticky flap underneath a paper strip that you peel off. Peel and seal envelopes make sealing the flap easier. 
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Self Seal EnvelopesSelf seal envelopes stick when they are pressed down without any need of wetting. 
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Pocket EnvelopesPocket envelopes have the flap on the short edge rather than the longer edge. 
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