Where can I find a shop that has a large range of coloured envelopes in different sizes, recycled envelopes etc? I'm looking for the kind of envelopes you'd use for invitations in C6 and C7 sizes as well as square envelopes (approx 100mm). I've seen various stationery shops that have business envelopes (DL and C6 size, but plain white), and also I've been to the excellent Chung Nam* store, which did have some very nice envelopes, but even their range was limited.

I've heard than Sheung Wan area has stationery shops, but so far it's mainly been office supply type stuff that i've seen there.

Does anyone have any idea whrere to get this sort of thing, online or retail stores?

*In case anyone's interested, this place is a great shop stocking almost everything you could want in terms of stationery, office supplies, paper goods, art supplies and also souvenirs, bags, office chairs, household stuff. It's at 503 Nathan road, next to Yau Ma Tei MTR.