6 × 6 envelopes are a beautiful square envelope size, ideal for stationery that needs a neat, balanced and elegant finish. Their classic square shape makes them a popular choice for wedding invitations, handmade cards, greeting cards and creative paper projects.
Measuring 155 × 155mm, 6 × 6 envelopes are designed to fit square cards or inserts measuring up to approximately 145 × 145mm. This makes them perfect for 6 × 6 style cards, save the dates, thank you cards, birthday cards, RSVP inserts, small prints and handmade stationery.
Whether you’re putting together a wedding stationery set, sending a thoughtful greeting card or packaging your own handmade designs, 6 × 6 envelopes offer a stylish and practical choice for square stationery with a polished, professional look.
What Fits Inside a 155x155 Envelope?
A 6 × 6 envelope is ideal for square cards and stationery designed to fit neatly inside: 145 × 145mm insertsSquare invitations6 × 6 style cardsWedding invitationsSave the datesRSVP details...
What Fits Inside a 155x155 Envelope?
What Fits Inside a 155x155 Envelope?
What Are 155 x 155 Envelopes Used For?
6 × 6 envelopes are a lovely square choice and are especially useful for: Wedding InvitationsPerfect for square wedding invites, save the dates, RSVP details and coordinated celebration stationery. Greeting...
What Are 155 x 155 Envelopes Used For?
What Are 155 x 155 Envelopes Used For?
155 x155 Envelope Dimensions
A 6 × 6 envelope is made to neatly hold square stationery such as: 145 × 145mm insertsSquare greeting cardsWedding invitationsSave the datesThank you cardsBirthday cardsRSVP details cardsHandmade card designsSmall...
155 x155 Envelope Dimensions
155 x155 Envelope Dimensions
Frequently asked questions
What size is a 6 × 6 envelope?
A 6 × 6 envelope usually measures 155 × 155mm. It is a square envelope size commonly used for square cards, handmade stationery, invitations and craft projects.
Is a 6 × 6 envelope the same as 155 × 155mm?
Yes, in UK stationery, 6 × 6 envelopes are commonly listed as 155 × 155mm square envelopes. The “6 × 6” name is the everyday card-making name, while 155 × 155mm is the actual envelope measurement.
Will a 145 × 145mm card fit a 6 × 6 envelope?
Yes, a 145 × 145mm card is a good fit for a 6 × 6 envelope. It leaves a small amount of space around the edges, which helps the card sit comfortably inside.
What is the difference between 6 × 6 and 165 × 165mm envelopes?
A 6 × 6 envelope is smaller, usually 155 × 155mm, and fits around 145 × 145mm inserts. A 165 × 165mm envelope is slightly larger and usually fits around 155 × 155mm inserts.