They are plastic, of course, and a nice, yellow-tan color, at that. If you paint their weapons, then apply The Dip (Minwax Polyshades Urethane Stain) -- Royal Walnut color, they will have that, 'just dug up', look.
Gary Gygax's 1977 AD&D Monster Manual seems like his Hill and Frost Giants were based off of 54mm Cave Men toy figures, and 60mm Vikings toy figures. He based his Humans off of 25mm tall Human figures, and the sizes listed in the MM translate to 54mm and 60mm, for these Giants, respectively, at that scale.
So, that means that these pretty much naked Skeletons would make great Frost Giant Skeletons, if you use 25mm tall Humans. And with 16 figures costing $1.99 USD, it's hard to say, "No", to this deal. The set comes with around 3-5 different poses; each is armed with either a sword, or an axe. No armor, no shields. One figure pose is kneeling, looks like he's looking down at 25mm man…
If the figures are bent, just soak in boiling hot water, for two minutes, using tweezers, tongs, or such, then pull them out, straighten them, and put them in a bowl of ice water to 'set' the new pose, permanently. This will allow you to have them standing upright, with straight weapons, if necessary.
These are Halloween left-over's, so act fast, if interested. They won't be around long, I suspect. Cheers!