envelopes cardboard best sellers

#1 A4/C4 234x334mm [ Pack AKAR A4/C4-234x334mm -[ Pack of 50 ] Strong Rigid Cardboard Envelopes/Cardboard C4 Envelope, Heavy Duty 400gsm,Corrugated Capacity Book Mailers,Peel & Seal, Rip & Strip Open Capacity A4 Book Mailler

£17.99 on Amazon

#2 🔥 A5 (C5) 23x16 cm 229x162mm AKAR A5 (C5)- 23x16 cm -229x162mm Please DO NOT Bend Cardboard Backed Please Do Not Bend Envelope with Peel & Seal Strip Board Back Pocket Peel & Seal Envelopes c5 hardback envelopes[Pack of 50]

£9.49 on Amazon

#3 🔥 50x C4 / A4 Manilla Hard TGL PACKAGING 50x C4 / A4 Manilla Hard Board Back Envelopes - 324x229 mm - Cardboard Backed Please Do Not Bend Envelope with Peel & Seal Strip - Perfect for Mailing, Posting & Storing Important Documents

£14.99 on Amazon

#4 Pack of 30 A4 Cardboard Pack of 30 A4 Cardboard Envelopes, Expandable Capacity Book Mailers, 400gsm, Peel and Seal, Rigid and Sturdy, Rip and Strip Open, Rigid for Royal Mail Letter Posting by Leo Design (30)

£18.90 on Amazon

#5 🔥 White All Board Envelopes White All Board Envelopes All Sizes Cardboard Strong Mailers C3 C4 C5 DL

£3.75 on Ebay

#6 Book Mailers Cardboard Book Mailers Cardboard Expandable Envelopes PIP * different sizes*

£4.69 on Ebay

#7 CARDBOARD CAPACITY BOOK CARDBOARD CAPACITY BOOK MAILERS BOARD ALL SIZES ENVELOPES AMAZON STYLE

£3.69 on Ebay

#8 🔥 HARD CARDBOARD BACKED HARD CARDBOARD BACKED 'PLEASE DO NOT BEND' ENVELOPES MANILLA BROWN A3/A4/A5/A6

£2.75 on Ebay

#9 ENVELOPES PADDED BUBBLE ENVELOPES PADDED BUBBLE LARGE LETTER CARDBOARD BROWN WHITE POSTAL UK A3 A4 A5 DL

£2.22 on Ebay

#10 20x C3 / A3 Manilla Hard TGL PACKAGING 20x C3 / A3 Manilla Hard Board Back Envelopes - 457x324 mm - Cardboard Backed Please Do Not Bend Envelope with Peel & Seal Strip - Perfect for Mailing, Posting & Storing Important Documents

£13.99 on Amazon

#11 🔥 CARDBOARD ENVELOPES ROYAL CARDBOARD ENVELOPES ROYAL MAIL LARGE LETTER POSTAL PLEASE DO NOT BEND A3 A4 A5

£2.32 on Ebay

#12 🔥 Pack of 30 A4 Cardboard Pack of 30 A4 Cardboard Envelopes,Corrugated Expandable Capacity Book Mailers, 400gsm, Peel and Seal, Rigid and Sturdy, Rip and Strip Open, Rigid for Royal Mail Letter Posting by Leo Design (30)

£19.40 on Amazon

#13 Please Do Not Bend Brown Please Do Not Bend Brown Postage Envelopes Kraft and Cardboard Strong Envelopes

£2.39 on Ebay

#14 Pack of 15 A4 Cardboard Pack of 15 A4 Cardboard Envelopes, Expandable Capacity Book Mailers, 400gsm, Peel and Seal, Rigid and Sturdy, Rip and Strip Open, Rigid for Royal Mail Letter Posting by Leo Design (15)

£14.49 on Amazon

#15 🔥 A6(C6) || 16x11cm || A6(C6) || 16x11cm || AKAR Do Not Bend Packaging Cardboard Backed Envelopes A6 Hard Backed Envelopes A6 Envelope (162 x 114mm) A6 Card Envelopes Cardboard Mailers (Pack of 100)

£9.99 on Amazon

#16 ENVELOPES ALL BOARD WHITE ENVELOPES ALL BOARD WHITE STRONG CARDBOARD ENVELOPES C3 C4 C5

£3.80 on Ebay

#17 50pcs 40mm Coin Cardboard 50pcs 40mm Coin Cardboard Mylar Flips Collect Holder Bag Bundle Cover Envelopes

£4.79 on Ebay

#18 🔥 50 Pack C4 (233 X 333 PACKNSELL 50 Pack C4 (233 X 333 mm | Cardboard Envelopes | Expandable Envelopes| Peel & Seal Letter Envelopes | Envelopes for Postal | Rip & Strip Open | Card Mailers for Royal Mail Large Letter Posting (PIP)

£20.99 on Amazon

#19 10 Pack C4L (249 X 349 PACKNSELL 10 Pack C4L (249 X 349 mm | Cardboard Envelopes | Expandable Envelopes| Peel & Seal Letter Envelopes | Envelopes for Postal | Rip & Strip Open | Card Mailers for Royal Mail Large Letter Posting (PIP)

£7.99 on Amazon

#20 🔥 🆕 A4/C4 || 324 x 229mm A4/C4 || 324 x 229mm || AKAR C4 Envelopes Hardback A4 Envelope C4 Do Not Bend Envelopes A4 C4 Envelopes Peel Seal (32x23cm) C4 Board Backed Envelopes Do Not Bend A4 Cardboard A4 Envelopes (Pack Of 10)

£4.79 on Amazon