The world of envelope sizes is a long and confusing journey. The letters and numbers all join together in creating the envelope size. Here at Printroom we help you to create custom envelopes with a range of size, design and sealing choices. We offer two types of envelopes, the DL and the C4, with full packaged paper or clear window envelopes, and colour or black and white design options. Read on to discover which standard Australian envelope size is best suited for your needs.
DL Envelope
A DL envelope (dimension lengthwise) is the most popular of envelope sizes in Australia. Suited to both business and personal use, the DL envelope size holds an A4 document folded into thirds.
- 110 x 220mm
- The DL envelope will hold an A4 sheet of paper folded into three equal sections
- Printroom offers with a clear address window or without. Get a quote now.
C4 Envelope
The C4 envelope size holds A4 sheets of paper without the need for folding. Ideal for thicker documents, the C4 is an envelope size perfect for documents that should remain unfolded like certificates, business documents and legal paperwork.
- 229 x 324mm
- The C4 envelope is perfect for an A4 sheet of paper unfolded
- Printroom offers with a clear address window or without. Get a quote now.
C6 Envelope
C6 envelopes can hold an A4 sheet folded into quarters, an A5 sheet halved, or an A6 sheet unfolded. The smaller size makes it ideal for flyers, greeting cards and invitations.
- 114 x 162mm
- The C6 envelope will hold an A4 sheet folded into quarters
- We cater to various custom online printing requests. Contact us to get a quote.
11B Envelope
The 11B envelope size is the smallest of standard envelope sizes. They are small enough to fit inside a larger envelope (such as a reply paid envelope), or can be used to hold invitations, RSVP cards, and announcements.
- 90 x 145mm
- The 11B envelope will hold small invitations and cards, or can fit inside a larger envelope.
- We cater to various custom online printing requests. Contact us to get a quote.
DLX Envelope
The DLX envelope is the slightly larger size cousin of the DL envelope. Like the DL envelope, it can fit an A4 sheet folded into thirds but the larger size makes it suitable for thicker documents.
- 120 x 235mm
- The DLX envelope size allows for thicker A4 documents, folded twice.
- We cater to various custom online printing requests. Contact us to get a quote.
B4 Envelope
The B4 envelope is the slightly larger size cousin of the C4 envelope. Like the C4 envelope, it can fit unfolded A4 sheets but it’s larger size makes it ideal for thicker documents.
- 250 x 353mm
- The B4 envelope size allows for thicker, unfolded A4 documents
- We cater to various custom online printing requests. Contact us to get a quote.
C5 Envelope
The C5 envelope holds an A4 sheet of paper folded in half, or an unfolded A5 sheet. Great for greeting cards, invitations, and A5 flyers.
- 162 x 229mm
- The C5 envelope will fit an A4 sheet folded in half.
- We cater to various custom online printing requests. Contact us to get a quote.
Plain or Windowed Envelope Sealing
Whatever envelope size you choose, printroom offers plain or windowed envelope sealing. A widowed envelope includes a clear plastic window so the recipient’s address can be printed on the paper within. Windowed envelopes are perfect for small and large business purposes such as invoicing and mailouts. Printroom offers printing services for custom windowed envelopes in DL and C4 envelope sizes.
Custom Envelope Design
Printroom offers custom 1 colour, 2 colour, and black and white designed envelope printing for DL and C4 size envelopes. When designing your custom envelope, it is important to keep in mind legibility, trim, and print colour properties to get the optimum results. Visit or print helpdesk for guidance on designing your custom DL or C4 envelope.
Frequently asked questions
What is the normal envelope size?
The right size for your custom envelopes will depend on your individual requirements. The DL envelope could be considered the “normal envelope size”, allowing for an A4 piece of page to be folded into 3 sections to fit perfectly.
What is a business size envelope?
The DL and C4 envelope sizes are both well suited for business purposes, each with its own benefits. The DL envelope envelope is great for mail outs and business communication, while the C4 envelope is well suited to thicker documents or legal paperwork.
Experts in Custom Printed Envelopes
Need assistance choosing the right custom envelope size, design and sealing for your business or personal needs? Check out Printroom’s online printing services or get in touch today.
