This is a great mat for under the rug I purchased.  I got a 7’ round to go under my 8’ round rug. I got it a bit smaller so I wouldn’t have to trim it or worry about it showing under the rug.  The sticky side of the pad grips my hardwood- there is no slipping at all.  The 1/4 inch felt side provides just the right amount of “cushion” 
I am very happy with this mat.  It is very well made.  You get what you pay for!