A 165 × 165mm envelope is specifically designed to fit:
155 × 155mm inserts
Square invitation cards
Square greeting cards
Wedding invitations
Save the dates
Thank you cards
Birthday cards
Handmade cards
Photo prints
Keepsake cards
Luxury square stationery
Choosing the right envelope size helps your square cards and inserts sit comfortably inside without bending or feeling too tight. A 165 × 165mm envelope gives your stationery a neat, balanced finish while helping to keep it protected and beautifully presented.