Postmaster Padded Envelopes A4 Gold Peel Seal Bubble Mailers 220x340mm, 10 Pack

These board back envelopes are exactly what you want if you need to post documents safely. They are sturdy, keep contents flat, and do a good job of preventing bends during transit. The board backing is strong enough to protect papers without being overly thick or bulky. They are easy to seal, the sizing is accurate, and they feel well made overall. I have used them for posting important documents and they have arrived in good condition. If you need reliable envelopes that do what they are meant to do, these are a solid choice. Great value and no complaints.

I’ve been using C5 cardboard envelopes for a few months now, and they’ve quickly become my go-to choice for mailing documents, photos, and small prints. The quality is outstanding — the cardboard is sturdy and gives a reassuring level of protection during transit. I’ve never had issues with bending or creasing, even when sending more delicate items. The size is just right for A5 documents or folded A4 sheets, making them super versatile for both personal and professional use. The self-seal adhesive strip is strong and secure, saving me time and hassle. Overall, these envelopes are reliable, professional-looking, and worth every penny. Highly recommended for anyone who wants peace of mind when sending important items

Perfect size for "small letter" sized postage items (as long as the contents are light enough for the package to remain in that category). Sturdy, would recommend.

Great, does its job, but smells awful

I’ve been using these to post cake toppers across the country and I’ve received no complaints, they always ensure my toppers arrive in one piece, are protected and nice and flat. Other similar items I’ve ordered in the past have arrived slightly bent but these came fully flat and straight which is great.

Excellent quality and just the right size and great value for money

Good quality, good price, arrived quickly.

Use these a lot for mailing larger packages out in the UK. They are durable and can take a good bit of beating. So far no reports of torn packages at the receivers end.

Briefumschläge für den Transport von Briefmarken sehr geeignet!

Looks well made, however it does not fit A4 standard paper inside, even a single sheet (Canon Black label A4) Edit: I figured you need C4 envelope to fit A4 paper sheet.