4.5" x 6.5" White Rigid Mailer Envelopes White 4.5" x 6.5" Rigid Mailer. 6.5" x 4.5" Mailer. 6.5 inch by 4.5 inch envelopes. 50-Pack or 100-Pack. White Rigid Mailers, Photo Mailers, Cardboard Envelopes, Privacy Envelopes. 300gsm thick 4.5 inch by 6.5 inch Peal and Seal, Self Sealing Envelope Weighs 0.5 ounce each Protect your valuable documents, photos, trading cards, CDs, DVDs, and other flat items during shipping with our 4.5" x 6.5" Rigid Mailer Envelopes. Designed with durable chipboard construction, these stay-flat mailers help prevent bending, creasing, and damage throughout the shipping process, making them an excellent choice for e-commerce businesses, offices, and online sellers.  

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6.25" x 9.75" White Rigid Mailer Envelopes White 6.25" x 9.75" Rigid Mailer. 6.25" x 9.75" Mailer. 6.25 inch by 9.75 inch envelopes.  50-Pack or 100-Pack. White Rigid Mailers, Photo Mailers, Cardboard Envelopes, Privacy Envelopes. 250gsm thick 6.25 inch by 9.75 inch Peal and Seal, Self Sealing Envelope Weighs 0.8 ounce each Protect your valuable documents, photos, trading cards, magazines and other flat items during shipping with our 6.25" x 9.75" Rigid Mailer Envelopes. Designed with durable chipboard construction, these stay-flat mailers help prevent bending, creasing, and damage throughout the shipping process, making them an excellent choice for e-commerce businesses, offices, and online sellers.  

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9" x 12.5" White Rigid Mailer Envelopes White 9" x 12.5" Rigid Mailer. 12.5" x 9" Mailer. 12.5 inch by 9 inch envelopes.  50-Pack or 100-Pack. White Rigid Mailers, Photo Mailers, Cardboard Envelopes, Privacy Envelopes. 250gsm thick 9 inch by 12.5 inch Peal and Seal, Self Sealing Envelope Weighs 1.5 ounce each Protect your valuable documents, photos, trading cards, magazines, and other flat items during shipping with our 9" x 12.5" Rigid Mailer Envelopes. Designed with durable chipboard construction, these stay-flat mailers help prevent bending, creasing, and damage throughout the shipping process, making them an excellent choice for e-commerce businesses, offices, and online sellers.

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