A 6 × 6 envelope is ideal for square cards and stationery designed to fit neatly inside:
145 × 145mm inserts
Square invitations
6 × 6 style cards
Wedding invitations
Save the dates
RSVP details cards
Birthday cards
Thank you cards
Handmade greeting cards
Small square prints
Keepsake stationery
Choosing a 6 × 6 envelope helps your square cards sit comfortably inside with just the right amount of space. It keeps your stationery looking neat, protected and well presented, whether you’re sending handmade cards, wedding stationery, photo prints or thoughtful personal notes.