Blake Purely Packaging C4 324 x 229 x 25 mm 140 gsm Gusset Pocket Peel & Seal Envelopes (9000) White - Pack of 125

I can’t fault these envelopes - they stuck well and the gusset means that even larger items (e.g. small files fit in with ease.

Good price and great item for Etsy jewellery (inside a box)

These envelopes are really good quality and open out so you can get quite a large amount of stuff inside. I use them in my online store to ship craft supplies and have been very happy with them. the seal is extremely strong, as are the seams, and do not require extra sticky tape to secure them.

I bought these to store numerous photographs and they are perfect.

Good quality and better value than what’s on the high street.

I required these for my business because they are EXACTLY the largest dimensions you can get and yet still have your shipment considered normal letters in Switzerland. Weak sealing notwithstanding, I got a rather unpleasant surprise when my letter was considered too wide (255 cm rather than 254cm - yes, 1cm off!). This may sound trivial but it more than doubled the shipping cost. This is because the unused gusset "sticks" out of and not into the letter. If you are planning to fill the envelope with 2cm worth of documents (and no less than 2cm; ideally 254cm*x*1.99cm) this is a perfect product. I will try stapling at one side to reduce my loss. You could also try smiling at the postal worker, but this is not guaranteed to work. :)

No issues, could have been slightly larger for my purpose, but having said that, would recommend.

I didn't realise when I ordered them that they aren't flat envelopes but open up like a concertina at the sides. This is ok if you are posting items of some thickness but in my opinion unsuitable for standard documents