A huge range of colours and sizes.
It is great to be able to order just one envelope so as to see the colour.
All the envelopes I received were excellent. Good quality paper, opaque, colours as expected, and very well packaged.
The shape of the flap on one of the envelopes I ordered (C5 Heritage green) was not exactly as shown on the website. The website shows a rounded flap, but the ones I received had a V-shape flap. Not a big deal: the envelopes are fine, and a great colour.
The website also has a tab "A4 paper", but it didn't go anywhere. I don't know if this company supplies paper as well.