A3/C3 || 321x467mm || AKAR Capacity Book Mailers Cardboard mailers Letter Envelopes A3 Cardboard envelopes Peel & Seal Postals Mailers for Royal Mail Medium Parcel Posting Card Envelopes (Pack of 10)
A5/C5 || 180x235mm || AKAR Manilla Capacity Book Mailers Cardboard mailers Letter Envelopes A5 Cardboard envelopes for Postals Mailers for Royal Mail Large Letter Posting Card Envelopes (Pack of 100)
A4/C4||324x229mm|| AKAR White Strong C5 Board Back Pocket Peel & Seal Envelopes Hard Board Backed Envelopes Do Not Bend Envelopes A4 Cardboard Envelopes Self Seal Card Backed Envelopes C4(Pack of 50)
SOUJAP 100 Pack A4 White Cardboard Envelopes, 325 x 230mm C4 Self Seal Rigid Mailers, Hard Board Backed Envelopes for Files, Photos, Paper
Rigid Cardboard Envelopes Peel & Seal – Large Letter Size Brown Mailers for Documents, Books & Calendars – Strong Postage Envelopes (34.5 x 25.5cm, Pack of 25)
Mailer Envelopes/Cardboard Envelopes A4 C4 Size - Rigid A4 for Book Packaging DVDs etc. Expand to Fit 35mm Thickness (25)
