Derwent XL Graphite is exactly that - extra big blocks of fine art natural graphite, securely slotted in a foam mould, within a useful and protective tin. Contains 6 thick sticks: one each of olive green, dark Prussian, raw umber, burnt umber, soft graphite and very soft graphite.
Each block differs slightly in size, but average dimensions are 60mm x 20mm x 20mm.
Naturally water-soluble.