I have a room that is 11.7 ft x 19.8 ft approx 240 sq ft that I need the rubber roll for. It needs to be firm but soft enough for elbows and hands to be on the floor so 1/2 thickness would be the least. I currently have 3/4 tiles through out and they are now uneven over 4 years of use and a tripping hazard so I think the roll would be better. Could you tell me what you thing would be best and can you provide samples before I decide? Thanks!-Ruth Show More