Most of these are done on 300 gsm Saunders Waterford paper. It has a slighlty warm tone to it compared to my usual Arches Coldpress, but I like it. It also comes in a ultra white variety, Ill have to try that next. Warping is minimal in these small sizes, and if it does occur, the whole paper lifts evenly, unlike the Arches that goes in waves. It seems to take a bit longer to dry and subsequently I'm sometimes to eager and go in before it has the correct dampness (adding to the stressfactor that is a watercolor) It really is like trying to cook five things simultaneously when you only have four hotplates, but the whole meal still needs to be done at the same time. Most enjoyable! Unless otherwise specified, these are 13x17 cm.