FATCAT Big Mama's Scratch 'n Play Ramp Reversible Cardboard Toy and Catnip Included, one size

1. What are the dimensions of the scratcher part? 2. Are refills available?

How do I prevent this from sliding around on the floor when the cats try to use it? My cats love this and want to use it, but as soon as they try, it slides around. It doesn't matter what type of floor I put this on, carpet/hardwood/laminate, it slides. Has anyone else encountered this and come up with a solution?

I am new to owning a cat and inherited this 8 year old female from my daughter. Will this type help trim down her claws?

Where is this scratching post made?