SINJEUN 100 Pack A4 C4 Cardboard Envelopes - 325mm x 230mm Self Seal White Manilla Hard Board Backed Envelopes for Files, Photos, Pictures, Papers 

• HIGH-QUALITY MATERIAL - These stay flat mailers are made of premium paperboard material. Even if they are not thick, they can prevent your documents from bending, folding and wrinkling, making your items reach their destination safely.
• SELF-ADHESIVE DESIGN - Strong flap adhesive can seal your stay flat envelopes firmly to provide the max protection for your privacy. The tear strip design can help you easily open the package and save your precious time.
• PROFESSIONAL APPEARANCE - The simple and clean white style gives them a professional appearance. You will get 100 packs of white cardboard envelopes. The size of each envelope is 12.7 x 9 inches. Their space is large enough to store your files.
• WIDELY USED - The stay flat mailers are very suitable for mailing documents, photos, papers, magazines, certificates, CDs, brochures, greeting cards, invitations, handmade crafts and so on. They are the perfect choice for courier companies, post offices, schools, factory wholesalers, retail stores, and personal use.

ABOUT FEATURES: ♦These lightweight and stay flat mailers are the best choices for transporting documents, photos and magazines. They can help you save shipping. ♦The tear strip design allows you to open them quickly and easily. 100 stay flat envelopes can meet your daily needs. ABOUT DETAILS: Material: 250 gsm paperboard Size: 12.7 x 9 inches (32.5 x 23cm) Color: white PACKAGE CONTENTS: 100 x Self-Seal Stay Flat Mailers