I think I've been sent the wrong things... They are both the length and width of an A4 page - like a prefold. It's edged in rainbow overlock and seems to be bamboo (but can't tell) The Greenkids pocket came empty, so I assumed these things were the inserts - but checking the greenkids website, I don't seem to have gotten an insert - just two of these A4 thingys.

Just Emailled them to ask about it. Will let you know how I get on...