Square Flap Envelope Template. For invitations and announcements that want to include 5” x 7” photos, this is the perfect square flap envelope template for you. Download free printable square flap envelopes template samples in pdf, word and excel formats
Baby blue, printable business envelopes for corporate letters and legal documents with peel and press, 50 pack, envelope size 4 1/8 x 9 1/2 (blue) 4.7 out of 5 stars 14 Then select the “mailings” tab. #10 square flap envelopes measure 4 1/8 in x 9 ½ inn (4.125” x 9.5” inches) and are a professional business envelope ideal for mailing checks, invoices, letterhead, personal letters, statements, and direct mail and more.