Bought some greenhouse fleece with attachment clips. Fleece came in two sections, but even then it was too unwieldy to install in my 10x6 greenhouse. It would be better to supply it in 4 sections - 2 sides and 2 ends, with small clothespeg-type clips to secure the joins. Biggest problem was the clips provided.. They didn't twist and lock firmly in the frame channels. IAssume the width of these channels is pretty standard (my greenhouse was from B&Q). I resolved the problem towards the end by attaching a bit of multi-tack to the end of each clip to secure it. I wish I had done this at the outset. Oh well, you live and learn.