Envelope flap style determines how an envelope closes and what it looks like. The four main types are: wallet flap (wide straight edge — best for thick inserts and machine stuffing), diagonal V-flap (pointed tip sealing toward the center — the classic letter envelope), square flap (straight, equal-height edge — popular for invitations and premium mail), and pointed flap (deep V-shape — elegant, formal). The interactive guide below compares each flap style side by side so you can choose the right one for your application.
Common Envelope Flap Styles Compared
- Wallet flap: Wide straight flap. Best for thick contents, booklet envelopes, and machine inserting.
- Diagonal (V) flap: Classic letter envelope. Pointed tip seals at the center of the envelope back.
- Square flap: Even-height straight edge. Preferred for greeting cards, invitations, and premium correspondence.
- Pointed flap: Deep, sharp V-shape. Formal and elegant — popular for wedding invitations and announcements.
Looking for a specific flap style? Browse our full envelope catalog or use our envelope finder.
