I was given washable nappies by a friend who told me I would need some liners, so I got these based on a previous review. I have to say I found they didn't fit either of the nappies I was using (Bum Genius V4 and Flip), one sheet was too big but when I folded it in half it was too narrow and left gaps at either side. To be honest I gave up using the liners because they seem very uncomfortable and unpleasant, perhaps this is the case with all liners but I only triedv this one brand...when wet they don't wick the moisture away and they crinkle up, I felt my daughter was sitting in, essentially, grease-proof paper covered in wee or worse. It's good that they are flushable but when she poo'd most of it went on the nappy because the liner had got wet and displaced, and then she needed cleaning with lots of (non-flushable) baby wipes anyway. Perhaps I wasn't using the liners correctly, but the instructions on the pack are practically non-existent and I couldn't really find any helpful advice elsewhere. If you want to be green, my advice is to just buy biodegradable disposable nappies and wipes.