Slightly better(?) picture for the #Origami-United contest. Both "snowstars" are essentially modular cubes a-go-go, made of 42 paper squares of various sizes for each one and assembled without glue. Most of the paler modules are a beautiful speckled silvery-grey, from a stash of premium recycled paper that I've had squirrelled away for a long time and am happy to've finally found a worthy use for. The face modules on the smaller one (visible only as the starpoint corners-- 4/face or 3/vertex) are from white paper, but the difference doesn't really show up much.
The basic face modules and edge hinges in the smaller one on the left are from Lew Rozelle's Origami Ornaments
, though he doesn't have the petal-tipped two-color hinges-- he does have a two-color version which he makes by layering inserts into the paper from the start, but that thickens up the flap folds at the bottom and I think this "out-sert" version is prettier anyway
Smaller snowstar, on left: maximum width ~4" from point to point. Face modules = six 3" squares, basic "floor" inserts (nearly invisible except for teeny blue bits under the starbird pyramids) = six 1.5" squares; blintzed starbird pyramids = six 1.5" paper squares. Edge hinges = twelve 2" squares; petal tips = twelve 1" squares.
Larger snowstar, on right: maximum width ~6" from point to point. Face modules = six 3" squares, basic "floor" inserts = six 1.5" squares, starbird pyramids = six 2" squares. Long edge hinges = twelve 3.5" squares; color tips = twelve 2.5" squares.
(I suppose that the "holiday" connection is that from this particular angle, both snowstars look six-pointed and they're in a blue/silver color scheme, which fits in with Hanukah? ...now I have a vague urge to come up with something related to Kwanzaa or Chinese New Year mumblesplat.)
Much later edit: I've drawn up an approximatate measurements chart
for the various modules, based on standard (non-metric) paper-cutting measurements.