English 
Plywood comes not only in differ ent th icknesses, but also in different grades, so you can choose the right one for your project. Lower grades a re used in construction of houses for subfloors and such. Obviously these types of plywood don’t need to look pretty since they’ll be covered up.
The higher grades of plywood (stain grade, cabinet grade, etc.) are much prettier and smoother. They have consistent wood grain showing, and generally lack knot holes or other major imperfections. And cabinet grade plywood is always sanded very smoothly on the surface.
You can also find plywoods in various wood species, like oak, or maple, or pretty much anything else, so that you can get exact look you want for your project.
