165 × 165mm envelopes are a stylish square envelope size, perfect for creating a more elegant and premium presentation. Their balanced square shape makes them especially popular for wedding stationery, handmade cards, invitations and special occasion designs.
Measuring 165 × 165mm, these envelopes are designed to comfortably fit square inserts or cards measuring up to approximately 155 × 155mm. This makes them ideal for 6 inch style cards, wedding invitations, RSVP sets, thank you cards, birthday cards, save the dates and luxury handmade stationery.
Whether you're designing a beautiful wedding suite, sending personalised thank you cards or packaging handmade greetings cards, 165 × 165mm envelopes offer a smart, versatile and eye-catching choice for stationery that needs to feel a little more special.
165 x165 Envelope Dimensions
A 165 × 165mm envelope is specifically designed to fit: 155 × 155mm insertsSquare invitation cardsSquare greeting cardsWedding invitationsSave the datesThank you cardsBirthday cardsHandmade cardsPhoto printsKeepsake cardsLuxury square stationery Choosing...
165 x165 Envelope Dimensions
165 x165 Envelope Dimensions
What Are 165 x 165 Envelopes Used For?
165 × 165mm envelopes are a stylish square option and work beautifully for: Wedding InvitationsA popular choice for square wedding invites, save the dates, RSVP details and matching celebration stationery....
What Are 165 x 165 Envelopes Used For?
What Are 165 x 165 Envelopes Used For?
What Fits Inside a 165x165 Envelope?
A 165 × 165mm envelope is a lovely choice for square stationery and is specifically designed to fit: 155 × 155mm insertsSquare invitations6 inch style cardsWedding invitationsSave the datesRSVP details...
What Fits Inside a 165x165 Envelope?
What Fits Inside a 165x165 Envelope?
Frequently asked questions
What size card fits inside a 165 × 165mm envelope?
A 165 × 165mm envelope is best suited to square cards or inserts up to around 155 × 155mm. This gives the card a little room to slide in and out without feeling too tight.
Are 165 × 165mm envelopes the same as 6.5 inch square envelopes?
Yes, they are often described as 6.5 × 6.5 inch style envelopes because 165mm is very close to 6.5 inches. They are a popular square size for cards, invitations and craft stationery.
Will a 6 inch square card fit inside a 165 × 165mm envelope?
Yes, a 6 inch square card is usually around 152 × 152mm, so it should fit comfortably inside a 165 × 165mm envelope with a small amount of space around the edges.
Will these envelopes fit a 155 × 155mm insert?
Yes, a 155 × 155mm insert is a suitable fit for a 165 × 165mm envelope. It leaves approximately 10mm total extra space across the width and height, which helps the insert sit neatly without being squeezed.
Do square envelopes need extra postage?
In the UK, postage depends on the finished size, thickness and weight once filled. A 165 × 165mm envelope is within the Royal Mail Large Letter size limits, but thicker cards, wax seals, embellishments or multiple inserts may affect the postage cost.