3 big sheets of thick black plastic. (Penkridge ST19)
These are huge. at least 8 by 12 feet, probably much bigger than that. Clean apart from a bit of mud. One is split at one end. Suitable for weed suppressing? Also a big builder's bag (the square sort) which would probably hold at least two of them if you squashed them down. I don't have a smartphone so email me and I'll get back to you probably within 24 hours.