Picked one up in Wilco (Wilkinsons) they are Good size 30x40CM and 1/2 inch thick so weigh 3 or 4 KG may be more don't have any kitchen scales, Put my turn table on top of it will be picking up some iso feet, apart from any isolation benefits it looks lovely.
FrankHarveyHiFi:Will look even better with a double layer......
My thought exactly, just wearing the other half down to the idea, was going to sandwich a chunk of non slip sheeting in between as additional isolation.
Have a set of sorbothane feet under there now but no chopped tomatoes the isolation properties are quite poor .