as the accessory measures 3 ft

Will not compresion set

It expands to 3-1/2”

thanks to its see-through exterior

JAM Paper Navy Blue #10 Business Envelopes measure 4 1/8 x 9 1/2 inches in size and are made out of high quality

JAM Paper 6 x 9 Open End Envelopes, Presidential Blue, 50 Pack (363913003g) VariesBy:Default as the accessory measures 3JAM Paper Presidential Blue 6 x 9 Open End Envelopes are made out of high quality, 24lb paper. Each one opens on the short end and features a commercial style flap with a secure gum closure. These envelopes measure 6 x 9 inches in size, which makes them great for folded documents and forms, letters, cars, paperwork, checks, receipts, and more. This pack contains a total of 25 envelopes. Fantastic for both professional and personal mailing purposes,