Green underlay is softer and springier than the Black, both have been stored in attic for a while so rather dusty but I have just used alot of the black in recarpeting a room. Now decided not to put remainder back in attic so it's got to go one way or another (weed control on an allotment?) Most pieces are not a true sqare or rectangle so dimensions given represent the biggest square you could cut out (in inches):
GREEN: 3 pieces: 52 x 104, 51 x 105, 53 x 82.
BLACK: 6 pieces: 33 x 30, 23 x 106, 22 x 45, 25 x 53, 68 x 22, 13 x 108.