I did a little bit of research, and here is how the skateboard compares to average 1:1 skateboards. They range in width between 18 and 27 cm and in length between 71 and 84 cm (again, on average). This 1:6 skateboard is 4.5 cm wide by 14 cm long, which puts it close to the upper limits of the average 1:1 skateboards when adjusted for scale. Anything longer than that (though usually narrower) would have made it a longboard. At any rate, the product is certainly not undersized for 1:6 scale.
The 1:6 skateboard features functional, rolling red wheels, and an elaborately decorated underside with spider web patterning, a dramatically damaged skull, and painted drops of blood (as part of the art, not weathering).
The top side of the skateboard has a yellow rim and within it is glued down a piece of black sandpaper, which presumably helps provide your figures a sure footing.
Without being really knowledgeable about skateboards, I find nothing really problematic here, except maybe this: the rather solid supports for the wheels make it rather difficult to have your figures hold the skateboard in what is apparently called the mall-grip (see below).
As usual when showcasing such products, I have kept things simple and avoided any visual trickery and special effects. But you can achieve more dynamic and impressive skateboarding scenes, especially if you resort to dynamic stands, some tape, and photo editing.
While a relatively simple affair, the 1:6 skateboard appears to be a fully functional and properly scaled piece that can be put to effective use for the protagonists or extras of any modern scene or diorama.
I hope this has been helpful. What do you think?