Square cello sleeves are a great way to protect and enhance your greeting cards or promotions. They have a self-adhesive closure, are acid free, and have archival quality. This way all of your content will certainly stay safe. Mail them alone or put one of our square envelopes to make your mail delivery extra impressive.
Square cello sleeves available in 8 sizes so that you'll be able to find one that fits for your occasion. Most of our sizes are available in clear but our 6 1/4 x 6 1/4 square cello sleeves come in different colors and designs! So whether you want to go clear to show off your amazing card, invite, or any other paper or have a tint of red to show off your vibrant side is up to you!
Love cello but want another size other than square? Check out our regular cello sleeve envelope page or color cello sleeve envelope page for a wide variety of them!